People are pushing all sorts of vitamins out in the market. The truth is that over the course of a year,the body requires only about 350gram of vitamins from the 862kg of food consumed in well-balanced meals by the average adult.
With proper nutrition from a variety of food sources, the physically active person or competitive athlete need not consume vitamins and supplements. That is a big "if" they consume a proper nutrition.
Some foods are rich in vitamins eg greeny leafy vegetables and roots of plants produce vitamins during photosynthesis. Animals from my knowledge don't produce them (except vitamin D), but get them from consuming plants, grains and fruits or eating another animal.
KINDS OF VITAMINS
13 types of vitamins have been isolated, identified and given RDAs.
Fat-soluble:-A,D,E,K
Fat soluble vitamins dissolve and remain in the body's fatty tissues, obviating the need to ingst them daily. They should not be consumed in excess without medical supervision.
Water-soluble:-C, B-complex
Act largely as coenzymes. They disperse in the bodily fluids.
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