Vitamins are one of the life-sustaining elements and a low-molecular-weight compound necessary for maintaining health. Such substances are neither raw materials for human tissues nor energy sources in the body. But it plays an important role in regulating the metabolism of substances in the body. The human body's demand for vitamins is very small, only one milligram or microgram per day, which is usually divided into autolysis and water solubility.

Vitamin A Vitamin A is closely related to maintaining normal visual function. If the body lacks vitamin A, it will reduce its adaptability to light and shade. Lack of vitamin A has the most direct impact on the epithelial tissues of eyes, respiratory tract, digestive tract and urogenital system. There will also be dry skin, dry and dull hair and easy to fall off.

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The active form of vitamin D can participate in the regulation of calcium and phosphorus metabolism, and can promote the absorption of calcium by small intestine and the reabsorption of calcium by kidney. So as to increase the blood calcium concentration and facilitate the precipitation of calcium in bones. For newly growing bone, it can promote the precipitation of its calcium salt, and for mature bone tissue, it can dissolve its calcium salt. When vitamin D is deficient, children will suffer from rickets and adults will suffer from osteomalacia.

Vitamin e.

Vitamin e can delay the aging of tissues, and vitamin e has anti-aging effect.

Vitamin C Vitamin C can promote the absorption and storage of iron and prevent anemia. Promote the conversion of cholesterol into carbonic acid and prevent gallstones. Helps detoxify and protect enzymes.