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...commonly labeled vitamins. In the human body, they play a vital role in helping regulate the chemical reactions that protect cells and convert food into energy and living tissue. Some vitamins are produced within the body. Vitamin D, for example, is manufactured in the skin during exposure to sunlight, and three other vitamins (K, biotin and pantothenic acid) are made inside the human gut by resident bacteria. But most vitamins must be ingested...

Author: /time Magazine | Title: The New Scoop On Vitamins | 4/6/1992 | See Source »

...carotene, the chemical parent of vitamin A -- that are known as antioxidants. These nutrients appear to be able to defuse the volatile toxic molecules, known as oxygen-free radicals, that are a byproduct of normal metabolism in cells. These molecules are also created in the body by exposure to sunlight, X rays, ozone, tobacco smoke, car exhaust and other environmental pollutants...

Author: /time Magazine | Title: The New Scoop On Vitamins | 4/6/1992 | See Source »

...step outside into the bright sunlight, blink for a second and realize that you have days left in Memphis, Tennessee. What...

Author: By Marion B. Gammill, CRIMSON STAFF WRITER | Title: Gape at Gold Pianos, Or Look at Art Instead | 3/2/1992 | See Source »

...split off and headed south on its own -- a phenomenon that has been observed in the past. And while ozone depletion has not been directly observed, the chemistry over the Caribbean appears to be right. There is ClO; there are plenty of dust particles from Pinatubo; there is sunlight. NASA's Kurylo thinks significant ozone loss is in fact happening in the tropics. Says Harvard's Anderson: "This is cause for extreme concern. It is the mechanism we most fear...

Author: /time Magazine | Title: The Ozone Vanishes And not just over the South Pole | 2/17/1992 | See Source »

...advantage over Photofrin II, say researchers, is that it causes significantly less photosensitivity in patients without losing effectiveness. While patients treated with Photofrin II often suffer first and second degree burns after only a few minutes of exposure to sunlight, so far BDP-MA has not been shown to have such side effects...

Author: By Ivan Oransky, | Title: RESEARCH BRIEFS | 2/5/1992 | See Source »

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