Page 17 - E-book Digestive System

4. Vitamin
Vitamins are organic compounds that are necessary in the body with a
small presence, the body cannot synthesize vitamins of the joints. Therefore, the
need for vitamins is widely obtained from outside the body. Only vitamins K and
D alone can be synthesized in the body. In the body, vitamins do not play a role
in producing energy. However, vitamins are only as catalysts (accelerate the
reaction) in metabolic processes. If a person is deficient in vitamins, metabolism
in the body may be disturbed.
Vitamins are divided into several types, including vitamins A, B1, B2, B3,
B6, B11, B12, C, D, E, K, pantothenic acid and vitamin H (biotin). While based on
their solubility properties, vitamins can be divided into two types, namely fat-
soluble vitamins and vitamins that soluble in water. Fat-soluble vitamins are
usually stored in body fats, for example, vitamins A, D, E, and K. As for water-
soluble vitamins, they cannot be stored in the body and only obtained from daily
food. Such vitamins for example Vitamin B and vitamin C. For more details, you
can pay attention to Table 4 below.
Table 4. Vitamin requirements of humans

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