A cup of coffee a day may keep retinal damage away

May 1, 2014 |

Coffee drinkers, rejoice! Aside from java’s energy jolt, food scientists say you may reap another health benefit from a daily cup of joe: prevention of deteriorating eyesight and possible blindness from retinal degeneration due to glaucoma, aging and diabetes.

Raw coffee is, on average, just 1 percent caffeine, but it contains 7 to 9 percent chlorogenic acid (CLA), a strong antioxidant that prevents retinal degeneration in mice, according to a Cornell study published in the Journal of Agricultural and Food Chemistry (December 2013).

The retina is a thin tissue layer on the inside, back wall of the eye with millions of light-sensitive cells and other nerve cells that receive and organize visual information. It is also one of the most metabolically active tissues, demanding high levels of oxygen and making it prone to oxidative stress. The lack of oxygen and production of free radicals leads to tissue damage and loss of sight.

In the study, mice eyes were treated with nitric oxide, which creates oxidative stress and free radicals, leading to retinal degeneration, but mice pretreated with CLA developed no retinal damage.

why coffee cuts risk of type 2 diabetes

The study is “important in understanding functional foods, that is, natural foods that provide beneficial health effects,” said Chang Y. Lee, professor of food science and the study’s senior author. Holim Jang, a graduate student in Lee’s lab, is the paper’s lead author. Lee’s lab has been working with Sang Hoon Jung, a researcher at the Functional Food Center of the Korea Institute of Science and Technology in South Korea. “Coffee is the most popular drink in the world, and we are understanding what benefit we can get from that,” Lee said.

Previous studies have shown that coffee also cuts the risk of such chronic diseases as Parkinson’s, prostate cancer, diabetes, Alzheimer’s and age-related cognitive declines.

Since scientists know that CLA and its metabolites are absorbed in the human digestive system, the next step for this research is to determine whether drinking coffee facilitates CLA to cross a membrane known as the blood-retinal barrier. If drinking coffee proves to deliver CLA directly into the retina, doctors may one day recommend an appropriate brew to prevent retinal damage. Also, if future studies further prove CLA’s efficacy, then synthetic compounds could also be developed and delivered with eye drops. The Korea Institute of Science and Technology funded the study.

43 Responses to A cup of coffee a day may keep retinal damage away

  1. 14019168 May 5, 2014 at 5:42 am #

    Interesting, I’m just wondering if all types of coffee contains the same amount of CLA? In our household of 4 we all wear glasses, even though we all have different coffee preferences. If this discovery is true, why do some people that drinks a lot of coffee, like me, still wear glasses ?

  2. Rivashan Molefi (14081726) May 5, 2014 at 12:12 am #

    Looking at the title of the blog, I was hoping to have an excuse for my ‘4 cups a day’ coffee drinking diet. Even though the CLA found in coffee is useful now, i believe the cons out weigh the pros of long term caffeinated coffee drinking. I must say that it did help me answer a question i always asked myself: Why do i have better eyesight than everyone at home?
    Once they are able to synthesize the compound, I do not believe they will have the same positive outlook on coffee but it may be seen as good medium of delivery of CLA especially in areas that do not have the proper facilities to administer the eye drops. Advertising companies will be able to use this info to their advantage.

  3. u14006325 May 4, 2014 at 10:11 pm #

    I can’t help but wonder if this will benefit all individuals to the same extent…I can’t think of anyone who doesn’t wear glasses just because they drink coffee everyday.Still this just goes to show how little we know about foods that we have been using for ages.More research should definitly be done.I agree with my fellow students that coffee should still be dranked within moderation,one can’t forget all the side-effects of too much coffee just because:” Drinking coffee will maybe improve my eye sight…”

  4. u14105854 May 4, 2014 at 10:20 am #

    This article displays the great value for drinking coffee as opposed to how people usually go on about the negative affects of the drink.

    What I find most interesting about this article is that it states the various other desieses which coffee could lower the risk of contracting, such as prostate cancer which is the leading killer of men in the US.

    furthermore as coffee is seen to possibly reduce the risk of glaucoma, and could thus be a replacement for medical marijuana as marijuana is illegal outside of medical practice.

  5. 14019036 May 4, 2014 at 9:31 am #

    Finally I found something that I can use to fight back whenever someone tells me that drinking coffee is bad for my health! This article is amazing and I’m so thankful that I can stop feeling bad for my body everytime I pick up a cup of steamy coffee. I do agree however that too much of a good thing ( in this case coffee) can be bad, for example the high caffeine content can give you heart problems and drinking too much coffee can stain your teeth, but for me the good still outweighs the bad. Also the chlorogenic acid (CLA) found in coffee can be a major tool in weightloss and in building muscle, that is why you can purchase CLA capsules from brands like USN. This article is what every coffee addict has been waiting for.

  6. lehlohonolo (14381886) May 4, 2014 at 9:08 am #

    Wow!!This evidence is pretty solid with respect to chronic diseases. Recently my sister told me that the caffeine would give me diabetes at our family gathering. It seems that there may be storm brewing against coffee. This evidence made me to think otherwise. Since decaffeinated coffee is also associated with low risk of developing diabetes, it is likely that phytonutrient in the coffee are preventing development of diabetes. I personally recommend decaffeinated coffee because caffeine can raise blood pressure which can lead to heart disease, stroke and kidney disease. Moreover, I would like to add that tea has a high antioxidant than coffee. Furthermore, tea consumption has been associated with low risk for developing many cancers and inflammatory conditions, where coffee is okay and tea better.

  7. park (u14013836) May 4, 2014 at 9:04 am #

    Another fascinating article I have found in this blog. The fact that coffee can actually “benefit” us sounds very interesting to me. Yet, I’m not convinced to drink it in daily routine. This article provided an excellent explanation to how we can benefit from drinking coffee but none of the possible harmful outcomes are mentioned. This positive information was discovered recently and majority of us were unaware of this fact. This means scientists can, at any time even tomorrow, discover new, unknown harmful effects of coffee.

    We humans are very eager for new discoveries and are also easily influenced. I do not think it is worth changing or concluding one’s diet plan according to a single research.

  8. Thabane Magoai(14032962) May 4, 2014 at 8:37 am #

    This is mind blowing! Is it in fact true that in every cloud their is a silver lining as coffee has been to the lab, and examined countless times and often bad was found as a result of coffee. Research has shown that 7 out of 10 people will in their life time suffer from retinal problems so this finding will help curb this issue. Nevertheless it has been shown that retinal problems do not affect vision very much. Do scientist interested in finding cures for retinal damage know why coffee is our hero? If they do are they working on what causes the curb in retinal damage in order to get a cure that will be faster than having the burden of drinking coffee?

  9. 14032113 May 4, 2014 at 8:28 am #

    An interesting discovery that will no doubt promote the drinking of coffee, with more research as stated in the article one day the drinking of coffee will be prescribed as a treatment to certain health problems but more research should be done to ascertain whether coffee has any detrimental affects other then possibly causing you to be hyper active and staining your teeth. Of course i still believe that coffee should be taken in moderation even with the current known benefits out weighing the known detriments as the age-old saying of “too much of a good thing could become a bad thing” might hold true to even this.

  10. Miche' May 4, 2014 at 7:54 am #

    This was indeed interesting to read. We always hear about the negative effects of coffee and how it is bad for you, but we never hear about the good in it. People seem to be blinded by the fact that coffee contains caffeine, which is an important fact but it is not the only one. People can actually benefit from drinking coffee more than they could lose. In this new day and age, with technology and more people sitting in front of computer screens, the intake of coffee could even prevent the damage caused, and could help with more of the retinal problems we have in the eyes. It is interesting to know that coffee and what it contains can actually be beneficial in decreasing the risks of chronic diseases, which might actually take us a step further and might help us find cures and preventions for these chronic diseases.
    I think I’ll have that cup of coffee now.

  11. Nyeleti (14190894) May 4, 2014 at 7:15 am #

    Wow, what an interesting article! There was a point where I felt guilty about drinking coffee because studies show that coffee contain caffeine which is bad for our health but this article has come to my relief as they say that a cup of coffee may keep retinal damage away. What an informative article it is, I’m impressed.

  12. Mantsha Rakhuduwe 14152402 May 4, 2014 at 6:24 am #

    All along I thought that coffee contains too much caffeine but now I know that is only 1%. Most of the people who consume a lot of coffee find it hard to spent a day without drinking it, in other words is addictive and increase the level of stress.

  13. u13099133 May 4, 2014 at 6:05 am #

    Wow! Here I am feeling guilty for drinking too much coffee. I am addicted to coffee as I drink much while studying and it keeps me awake while burning the midnight oil. My parents tried making me feel guilty by talking about my health in the long run, but seems like my eye sight will benefit in the long run.

  14. tshegofatjo May 4, 2014 at 5:29 am #

    One apple a day keeps the doctor away.Is this really true with coffee? It is not recommendable to drink caffeine everyday as anything too much is bad for your health.Yes it does have a benefit to drinking the coffee but anything good has bad to it so it is better to consume small amounts of caffeine than getting yourself addicted thinking your expanding your own life-span. u14018625

  15. Karabo(14046874) May 4, 2014 at 4:33 am #

    This is some interesting fact. I thought caffeine was not good for our bodies, little did I know that coffee actually contained a small amount of caffeine. I still beg to differ cause coffee is still no good. And because it helps prevent one disease does not mean it cant be the cause of others.

  16. u13246195 May 4, 2014 at 2:35 am #

    What an interesting find! Should be good news to all the caffeine/coffee addicts of the world. Who knew that coffee had such good properties, especially considering that so many other sources and research support the notion that coffee is bad for us. I guess like everything else it has both good and bad properties. I believe that more research should be done on both the good and bad properties of coffee, as there is a lot of contradicting evidence.

  17. Jordan 14088241 May 4, 2014 at 1:01 am #

    This research into the possible benefits of coffee excites me as most people do i enjoy a good cup of joe. it is very interesting to know that my daily cup of coffee could be aiding in keeping my eyesight in good condition. it is incredible to think that coffee which has been seen as “bad for you” may in fact have health benefits that could prove to be very helpful in our future sight. Finally the glory of coffee is being seen in the world of science and is not only being reported as having negative effects on one’s health but now the possibilities of positive effects. I am very interested in the future results of these tests while enjoying a cup of coffee have the possible assurance of maintained eyesight!!!

  18. u14041724 May 3, 2014 at 5:45 pm #

    WOW!!Who would have thought that coffee might have an incredible benefit after it had always been known to be bad for the brain,neurons etc.’monster turning into a hero’. I guess the saying that ‘too much of everything is not good applies here,there’s clearly no damage in taking the acceptable amount of coffee daily.Research shows that it can relieve retinal damage if taken in safe amounts.With all the negative impacts that were found about coffee,it makes it impossible to accept that it can be helpful too.

  19. Natalie Loffler 14113067 May 3, 2014 at 12:59 pm #

    There is a lot of controversy whether coffee is a beneficial beverage or just another addictive drink. If this new information is reliable then this can be very helpful to a lot of people. If you think about the amount of people that wear glasses or are in need of glasses then this can be good new for them and for the future generation as it will decrease the risk of blindness and slow down the process of retinal deterioration. This will not only decrease the amount of people needing glasses but might also decrease the amount of car accidents over time as the eye sight of drivers will improve. Another thing to think about is the amount of deaths due to diabetes, prostate cancer and Parkinson’s will be decreased which may increase the life span of the population. But I also agree with Adrian (14050162) and koketso molepo(13373201) that this information must be more researched, in ways such like the points mentioned by 13140346, and the other negative facts about coffee be must be out proven before this information can be deemed reliable. Although if this information is reliable then researchers could try to incorporate chlorogenic acid (CLA) into our daily diet. Then if this can be done then won’t this help blind people to see?

  20. Hlamalane S. Shilote 14005086 May 3, 2014 at 12:29 pm #

    Drinking coffee daily is not that harmful to one’s health and the recent research mentioned in this article agrees with this. Research done over the past years as well have portrayed more benefits of drinking coffee daily than health deterioration risks.

    In a study of about 130 000 Kaiser Permanente health plan members, people who drank coffee daily were 20% less likely to be hospitalized for abnormal health rhythms than non-drinkers. Coffee does not only have the potential of preventing retinal damage but also has other benefits such as reducing the symptoms of Parkinson’s and Alzheimer’s disease, reducing the risk of developing Type 2 diabetes and also it is good for one’s liver particularly if alcohol is consumed. The caffeine that people worry about, there is only 1 percent of it in coffee which cannot do that much damage.

    Many people may disagree and think that it is a suicide mission but they are clueless as it is harmless if only a few cups are consumed daily, and as for coffee drinkers like me it is another good excuse to drink it daily.

  21. koketso molepo(13373201) May 3, 2014 at 6:32 am #

    i disagree, studies have shown that drinking a cup of coffee regularly can be harmful as, one would compare drinking coffee to smoking cigarettes. it’s true that one cup might be helpful but we should bare in mind that coffee contains caffeine and its easy for a person to be addicted since well they have seen how it brings positive effects to their brains.

  22. 13140346 May 3, 2014 at 5:38 am #

    This hypothesis-generating study is great news for coffeeaholics who will delight should this association between coffee intake and retinal functions be proven correct in humans, given that findings in rats cannot necessarily be extrapolated to humans. Consequently, I agree with Nicole (14025664) that many questions remain unanswered and it cannot be recommended to increase coffee intake based on this study alone. Some aspects that require proving include: firstly, the amount of chlorogenic acid (CLA) required to prevent retinal deterioration in humans; secondly, the quantity of coffee that the human would have to consume to achieve this beneficial effect; and thirdly, the exact relationship between coffee and CLA given that the mice were given CLA and not coffee (there are other chemicals in coffee that could influence its effect on the retina and the general health of the individual positively or negatively). This study is a good start for further research.

  23. Adrian (14050162) May 3, 2014 at 3:12 am #

    Its hard to believe that there are so many sources that would argue that coffee is in fact “bad for you”. It is true that a single cup a day is not too much of a concern but regardless, dentists despise of it, it causes an increased risk of miscarriage in pregnant woman, and even though coffee is only 1% caffeine, one can still become slightly addicted to it can they not? still interesting to see that such studies are being conducted on something as simple as our morning cup of coffee.

  24. u14154847 May 3, 2014 at 2:53 am #

    I agree with most of you that there is nothing better than a morning cup of java, and i was not surprised when i came across this article that they have found yet another possible reason that coffee is good for you.

    For centuries, coffee has been consumed in many countries all over the world. Statistically, coffee is the most consumed beverage worldwide. This is one of the main reasons why scientists are constantly searching for positive attributes to coffee. It gives people reason to continue to drink it. Having said that, I have my own cuppa’ every morning.

    As some of the other comments have shown, there are many other known benefits as well as disadvantages. For example, coffee is known to be related to headaches as well as different types of cancer if consumed in copious amounts, as previously mentioned. Although, studies also show that cancers such as prostate, breast and oral cancers are much less common in regular coffee drinkers who consume one to two cups daily.

    Lastly, where many people who read this may then say that they are glad that their habits now have benefits, these benefits are only commonly observed when drinking coffee brewed in ground or raw coffee beans. This means that all those ‘instant coffee’ drinkers out there who think they doing themselves a justice are not reaping the benefits that coffee may have to offer.

  25. Castyn Winfield 12026795 May 3, 2014 at 2:10 am #

    It is amazing to think that something as common and simple as coffee combined with excessive research can prevent something as complex as retinal degeneration.

  26. u14007739 May 3, 2014 at 12:14 am #

    Consuming coffee everyday, to me was a slow suicide mission that would end with someone having serious brain problems. but because of studies conducted everyday by scientists all over the world, I now that coffee intake is not all that dangerous in fact it is essential for the prevention of the development of serious eye defects. Who knew that a cup only contains 1 percent caffeine, although too much it is a small price to pay than to experience eye problems in the future.

  27. Nicole (14025664) May 2, 2014 at 11:38 am #

    It is very interesting to see that Coffee can actually be useful to the human body with the help of CLA, Chlorogenic acid. Many people use CLA as a dietary supplement as it is supposedly important in anticancer benefits and bodybuilding. Studies have shown that there is a lack of good evidence in human health benefits and CLA may cause side effects such as stomach problems, diarrhoea, nausea, and fatigue. Therefore as the previous comments stated coffee drinking must be done in small amounts. People will most likely even drink more coffee if they hear that it is good for their eyes. The problem with this is that if they start drinking too much coffee, the negative side effects of drinking too much coffee may greatly outweigh the positive benefits. Also, in the article it also shows that there are still many questions that are unanswered and that the conclusion to this study most likely puts the cart before the horse.

    While giving mice CLA helped them in preventing deterioration of their eyes, much study must still go into the benefits of CLA for human eyesight, since the amount of CLA ingested via coffee may either be too little or too much. The question of what happens if too much CLA is ingested must be thoroughly studied.

    It may yet be too early to open a bottle of Champagne to celebrate. Only time will tell.

  28. Lizanne Bester (u14100313) May 2, 2014 at 8:19 am #

    The retina is a layer of tissue that is lining the inner surface of the eye and is very sensitive to light. An image is formed on the retina from what is observed, with the help of the cornea and the lens. When the light strikes the retina, chemical and electrical events are initiated, which develop into nerve impulses and are sent to visual centres of the brain through the optical nerves.

    One can thus derive that damage to the retina is serious and can hold many disadvantages for one with retinal damage. There would be no way that a clear image would form.

    There are several treatments on the market for diseases or disorders affecting the retina. It is obvious that the type of treatment required, depends on the nature of the disease or disorder. Some of these treatments include transplantations (with not much success) and The University of Southern California, RWTH Aachen University, and the University of New South Wales are currently busy developing an artificial retina that will bypass the photoreceptors of the retina and stimulate attached cells directly.

    All good! But I can only imagine what such transplantation costs. Therefor it is good to know that a simple cup of coffee may keep retinal damage away so that no transplantations will be needed!!!!

  29. Lesego MOKONE (14124221) May 2, 2014 at 5:14 am #

    WOW!!This is so interesting all my life i thought drinking coffee was bad for me so today by reading this my mind is at ease. My mornings without a cup of coffee were not complete and i always drink coffee just for pleasure so from now on i know that i have a reason to drink coffee. I always heard that carrots are also good for your eye sight and my parents always forced me to have carrots but i HATE vegetables so now i have plan b that will prevent my eyesight from deteriorating…THANK YOU:-)

  30. u14174546 May 2, 2014 at 4:50 am #

    It is very interesting to consider that coffee has a positive effect on the retina, and that it improves eyesight. As a coffee lover, this is great news, but one has to think objective in life, so I have to say that this research is very misleading.
    Just like any substance it is not recommended to over-use it. Although coffee contains CLA, it still has many health risks for example increase in cholesterol, the amount of CLA in one cup of coffee is not enough to say that it will improve one’s eye sight. Coffee may have potential health benefits but more research needs to be done.

  31. 14056233 May 2, 2014 at 3:50 am #

    Although this article only shows the benefits that coffee has, coffee drinking is not all that good. Just because it contains ClA which has benefits for eyesight doesn’t mean you should start drinking coffee in large amounts. In 2002 a study was done by Yingsong Lin and his group of scientists on the risk of pancreatic cancer in relation to drinking coffee (Lin et al 2002). They found that drinking more than four cups of coffee per day significantly increases a person’s risk of developing pancreatic cancer (Lin et al 2002). So even though coffee has it’s benefits, try not to overdo it.


    Lin, Yingsong et al. 2002. Risk if pancreatic cancer in relation to alcohol drinking, coffee consumption and medical history: Findings from the Japan collaborative cohort study for evaluation of cancer risk. International journal of cancer. Vol 99 issue 5.

  32. u14316073 May 2, 2014 at 1:43 am #

    When noticed this blog, joy immediately came over me because I am a committed coffee drinker. I have one cup every morning and I have received pep talks from many people about how unhealthy my habit it, at least now I can tell them it’s beneficial somehow.

    I am totally in agreement with this blog. Raw coffee, also known as green coffee, is made of fresh coffee bean that have not been roasted. (Take care to drink the right coffee, not all coffee is raw.) The roasting process decreases the level of chemical chlorogenic acid present. As the blog states, it is this antioxidant that may prevents retinal degeneration. To add on to some of the other benefits of raw coffee, it may also help with weight loss without extra exercise needed, how great is that.

    However, in as much as I am filled with excitement about this information I still have a few questions to ensure maximum health benefits. Which brands of coffee are most reliable to provide quality raw coffee? And seeing as this could lead to a change in lifestyle, it also has an impact of the budget which leads me to the questions, what is the price difference between raw coffee and ordinary coffee? And lastly, am I restricted to only one cup a day?

  33. Robertha (14007445) May 1, 2014 at 11:22 pm #

    Really interesting research right there especially for me as someone who can’t live without coffee. The only problem is, how much is enough? And which coffee should coffee “addicts” be drinking, because whilst some coffees help decrease chances of getting diabetes, strokes and some cancers, unfiltered coffee increases your cholesterol levels and females who drink too much coffee could experience problem with getting pregnant.

    Another issue I think might need to be taken into consideration is that not everyone reacts the same to caffeine, because I can have a strong cup of coffee right before I go to bed and still I would sleep like a baby, whilst other people might just think about coffee and not be able to sleep that evening.

    So do we just stop drinking coffee, have our normal one or two cups a day or drink it like the world is coming to an end?

    Honestly, I can’t wait until all these questions about whether coffee is truly good or bad for you is answered, it’s bound to be interesting results…

  34. u04463936 May 1, 2014 at 10:34 pm #

    This is comforting news to a coffee drinker. However, having said that, there are a number of questions or issues that need to be considered. What is the appropriate amount of coffee that one should consume? Does the coffee beans used to make the coffee matter? Does the manner in which the beans are roasted affect the benefits? Is black coffee more beneficial than coffee with milk? While these questions persist, it is reassuring to know that there are still numerous inroads that science could make in providing a better understanding of some of our everday activities. It is important to bear in mind that an holistic approach has to be adopted when ascertaining the overall benefit of any product. The environmental damage that is caused through the growing and manufacture of coffee should also be considered. In this regard, while the end user may benefit from coffee consumption, the net welfare effects on society as a whole are important. All too often, this is an issue that gets clouded by commercial interests.

  35. u14039606 May 1, 2014 at 2:07 pm #

    It is interesting to consider the possible positive effects that a daily, moderate amount of coffee may have on human retinas, and consequently eyesight. However, I would like to emphasise that, much like the suggestion of drinking just one glass of red wine a day to reduce the risks of coronary heart disease, coffee should also be drunk only in moderate amounts.

    I would also like to question the effects that the preparation of the coffee beans might have on the amount of CLA that is eventually ingested. It is true that raw coffee contains a substantial amount of CLA, but that amount could be decreased after the beans have been roasted. If so, this would mean that drinking normal coffee every day might not be as beneficial as the given information may lead us to believe. I would support research in developing other methods of CLA intake.

  36. 14037158 May 1, 2014 at 12:42 pm #

    This research possesses great potential, however, is quite misleading. CLA may be a significant contributor to the decreased possibility of acquiring retinal damage, but coffee may not necessarily be. The amount of CLA present in a single serving of coffee is insubstantial to make a significant difference in the human body, unless the coffee consumed excessively – which results in many other negative side effects and poses a threat to one’s health. More research needs to be done, mainly focussing on the development of an appropriate brew that will contain a substantial amount of CLA per serving to avoid the excessive consumption of caffeine etc. – so that one won’t be avoiding retinal damage to ones’s at the risk of one’s health. I look forward to future articles on the subject.

  37. 14054672 May 1, 2014 at 10:22 am #

    I strongly agree with Eloise. Although these studies prove that CLA, which is present in coffee, can reduce and even prevent retinal damage, we should still be careful. I am very impressed with the experiments, but I doubt enough experiments have been done to monitor CLA effects as well as the effects other components in coffee.

    Coffee can be seen as a bad thing, and some still refuse their cups of coffee as a result of certain ‘myths’. But others are utterly dependent on coffee, focusing on the positive results experiments (such as the above) have delivered.

    There are pros and cons to coffee. I am a firm believer of my morning cup of coffee and I do believe in the positive effects coffee may have, but I am sure that too much coffee can also cause serious problems.

  38. Eloise Sarah Butcher (u14104254) May 1, 2014 at 9:50 am #

    The article above mentions a case study where CLA is shown to have prevented retinal damage in mice, however it does not explicitly state that administering coffee will yield the same results. We should therefore not get carried away and all start drinking more coffee! If future trials show that caffeine can carry CLA across the blood-retinal barrier then I will be first in line at my local coffee shop. It is unfortunate that in order to prove theories we still rely on animal testing.

  39. u14033692 May 1, 2014 at 8:42 am #

    This article delivers wonderful news to coffee lovers especially those who do suffer from poor eyesight . I think if they are successful in creating eye drops with synthetic compounds containing CLA or resembling CLA it would revolutionise certain treatments in ophthalmology.At the moment the only other study, that I am aware of, on the subject of preventing retinal damage (done by The University of Michigan Kellogg Eye Center) is only applicable to diabetic retinopathy. This study is truly unique !On another note yes coffee can be addictive as previous comments have stated but coffee also has multiple benefits that most of us are not aware of. A recent study has shown that coffee obstructs a neurotransmitter called Adenosine, this results in increased levels of norepinephrine and dopamine which ultimately results in better memory, mood, reaction times and general cognitive function.

  40. 14129940 (Lehlohonolo Thobela) May 1, 2014 at 8:01 am #

    Wow! This research has brought much clarity into my life. I always thought that drinking coffee prevented nephritis in any dose per day. only to find out that it all matters…..in fact, it is IMPORTANT! I support the previous blogger’s comment on using the above mentioned benefits as an excuse to drink much more coffee than it is needed in the body because i am a victim of it. Now i have light in my dose and i am going to start practicing good health by taking one cup of coffee per day instead of 3. #Let there be coffee!!!!!!!

  41. Roshan Essa (14003377) May 1, 2014 at 7:47 am #

    This information is very beneficial. Being a person that does not drink much coffee it is certainly surprising to hear the benefits that coffee has on chronic diseases. In the light of this information i should reconsider maybe having a cup of coffee now and then. As the previous two people have said that over indulgence of coffee could later lead to an addiction and could also prove to be fatal to your health. It is really amazing to hear that there are people out there looking to find ways to make our lives better. I really do hope that the research conducted proves to be beneficial in making the lives of people a healthier one. These functional foods can be very beneficial in reducing the risk of diseases.

  42. Andrea-u14018463 May 1, 2014 at 7:12 am #

    It is great to know that the most popular drink in the world is a lot more beneficial than we first thought. I knew that coffee helps speed up metabolic activity, but knowing it can also prevent or at least decrease your chances of suffering from chronic diseases is comforting. On the contrary, people may use this information to their advantage as an excuse for drinking too much coffee that later can lead to an addiction as above mentioned.

  43. 14009863 May 1, 2014 at 5:44 am #

    This research poses a very interesting topic about coffee being beneficial with respect to one’s health. In contrast, however, just as any other drug or substance, it is possible to become addicted to coffee. Some people who drink 4+ cups a day might use these results as a convenient excuse to drink a lot of coffee and may even believe that it is healthy to drink more than 4 cups of coffee a day. So what I think should be highlighted here is that it is all in moderation. Anything and everything can be overdone, therefore it is important to note that this research talks about a SINGLE cup of coffee a day. I am looking forward to the further development of this research! I have personally never been a coffee drinker and in light of this research I am beginning to think that maybe a cup of coffee every now and then isn’t such a bad idea after all…

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