Dog nails aren’t supposed to fall off, thought first-time dog owner Terrie Huberman some 18 months ago. Studies have not demonstrated that antioxidant vitamin supplements (such as vitamins C and E) prevent cataracts, however. Convenient 30 Daily Packs of Recommended Vitamins and Supplements, Delivered Right to Your Door. These vitamins work by reducing levels of homocysteine, a toxic amino acid that’s a natural byproduct of digestion.
So these kinds of vitamins need to be replaced often because they don’t stick around! While diet is the key to getting the best vitamins and minerals, supplements can help. Currently, the most important benefit claimed for vitamins A, C, E, and many of the carotenoids and phytochemicals is their role as antioxidants, which are scavengers of particles known as free radicals (also sometimes called oxidants).
Studies on the health benefits of vitamins and minerals have some important limitations. In these people, high doses of antioxidant vitamins may actually protect cancer cells just as they do healthy cells. A low dietary intake of vitamins A, C, E, and beta-carotene has been linked to heart disease.
Water-soluble vitamins do not get stored in the body for long – they soon get excreted in urine. As with vitamins B6 and B12, deficiencies of folate raise levels of homocysteine, an amino acid in the body that may increase the risk for heart disease, and possibly Alzheimer’s disease.
Vitamin D is essential for the absorption of calcium into bone and for normal bone growth. For some reason, we evolved without the ability to make the small number that we call vitamins. Most vitamins are converted in vivo into coenzymes that work with metabolic enzymes to complete their biochemical functions.