Ncert Exercises & Solutions

Which of the following B group vitamins can be stored in our body?

1. Vitamin $B_{1}$

2. Vitamin $B_{2}$

3. Vitamin $B_{6}$

4. Vitamin $B_{12}$

Hint: cobalamin

B group vitamins and vitamin C are soluble in water so they are grouped together. Water soluble vitamins must
be supplied regularly in diet because they are readily excreted in urine and cannot be stored (except vitamin B₁₂) in our body.

The body can store vitamin B12 for years in the liver.
Cyanocobalamin (Vitamin B12) | C63H88CoN14O14P | CID 5460135 ...

Cyanocobalamin (Vitamin B12) | C63H88CoN14O14P | CID 5460135 ...

If vitamin B12 stored in the liver is required, the adenosyl group separates to transport cobalamin to the cells where methyl and hydroxocobalamin are formed. Methylcobalamin levels are always lower, not because there is a higher demand, but because once formed it is used immediately. In contrast, hydroxocobalamin spends longer in the body.

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