Question

Why is there no enzyme to digest vitamins?

Answer 1

Hint: It is a group of organic substances that are necessary for small quantities for the normal health and growth of humans and animals.

Complete answer:
Vitamins act as catalysts all the time, either the nutrients themselves are coenzymes, or they form integral parts of coenzymes. They can be directly absorbed by the living cells So, there is no requirement of enzymes to digest the vitamins to get absorbed by cells. The vast majority of the water-soluble vitamins are transported across the small intestinal membrane by carrier-mediated mechanisms, but vitamin B12 also named as cobalamin, is moved by a receptor-mediated mechanism.

Additional information:
> Vitamins are essential for the normal growth and development of a multicellular organism.
> Vitamins vary from the other biological compounds because they are needed in a relatively small amount to complete their functions.
> The absence of a vitamin in one or more specific metabolic reactions in a cell may lead to disruption of metabolic balance within a cell or in the whole organism as well.
> The vitamins vary in structure hence, there is no chemical grouping common to them all.
> Vitamins are necessary for the development of tissues, bones, blood cells, hormones, and chemicals for the nervous system.
> They are also essential for the growth, health, and physical balance of the body.

Note:
> The water-soluble vitamins include ascorbic acid also known as vitamin C, thiamine, riboflavin (Vit B2), niacin (Vit B3), pyridoxine (Vit B6), vitamin B12, biotin, and pantothenic acid.
> Fat-soluble vitamins include retinol (Vit A), calciferol (Vit D), tocopherol (Vit E), and vitamin K. They are soluble in fat and get absorbed by the fat globules.