Lettuce leaves that have turned brown are unsafe

No. It's not a health issue and does not indicate a loss of nutrients. Still, most people find brown lettuce unappealing and will want to cut off the discolored parts. Browning usually results from oxidation caused by exposure to air when the leaves have been bruised or cut. Another cause is "tipburn," which occurs in the field because of climate or soil conditions. Exposure to the ripening chemical ethylene (pr [...]

Extra C Gets an “F”

>> DRUG RUNNER Don't bother dosing uo on Vitamin C before exercising. Researchers at Colorado State University who tested mega-doses of vitamin C in hopes of proving that it could improve exercise performance discovered that the vitamin had no effect at all. The study, pulished in the Journal of Applied Physiology, aimed to link huge doses of Vitamin C - 500 milligrams daily plus intravenous infusion - with in [...]