Vitamins and supplements like melatonin and fish oil offer health benefits but can cause side effects if misused. Learn about the impact of saw palmetto on blood pressure and find the best multivitamins for young women and adults over 50.
Phenylalanine is an amino acid used to make proteins and brain chemicals including dopamine, adrenaline and thyroid hormones. Since our bodies cannot manufacture phenylalanine, we must obtain it in food. Phenylalanine is found in most foods that contain protein and also in the artificial sweetener aspartame.
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Vitamins generally should be supplied by the diet, although there are some, such as vitamin D, that the body can produce naturally through sun exposure. A deficiency of vitamins may be dietary in origin or due to secondary causes, such as improper absorption.
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Vitamin B-12 is an essential vitamin required for healthy blood cells and nerves. Dietary animal products, such as fish and poultry, are the main source of B-12, providing significantly larger amounts than the daily requirement of two to three micrograms.
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Ascorbic acid, or vitamin C, is needed to make collagen. Collagen is the most abundant protein in your body, serving a variety of structural functions. It is a major component of your skin, cartilage, blood vessels and eyes. Collagen is also rich in the amino acids proline and lysine.
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