My question is about the holidays, and it’s two parts. The to-do list just seems to get longer each year, and I’m already feeling stressed-out. Also, I just ...

Recent studies show that nitrate and nitrite are physiologically recycled in blood and tissue to form NO and other bioactive nitrogen oxides. Thus, they should be viewed as storage pools for NO-like ...

Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...

Blood in your urine can be caused by exercise, injuries, or kidney disease, and should be checked by a doctor. If blood in your urine lasts more than 72 hours, even without pain, see a doctor. You can ...