WASHINGTON, February 28, 2011) — Results from a study published in Blood, the Journal of the American Society of Hematology reveal a close relationship between pulmonary arterial hypertension (PAH) — exceedingly high blood pressure in the arterie…
At health spas, mall kiosks, and “oxygen bars” across the country, people are paying to breathe oxygen. For about a dollar a minute, enthusiasts inhale 95 percent oxygen ? air offers a paltry 21 percent O2 ? and report that it relieves a variety of maladies from hangovers to headaches. The practice may be a bad idea, according to scientists studying the damaging effects of free radicals ? highly reactive molecules derived from oxygen.