Which of the following is not a vitamer of vitamin D?

Correct! Wrong!

Which of the following is not a vitamer of vitamin D? Answer: (D) Tocotrienols

Tocotrienols are not a vitamer of vitamin D. Vitamins are organic micronutrients that an organism requires in very minute quantities for its metabolism. Vitamins are broadly classified into fat-soluble vitamins (vitamin A, vitamin D, vitamin E, and vitamin K) and water-soluble vitamins (vitamin B and vitamin C).

On the other hand, the term “vitamer” refers to chemically or biologically similar compounds which show similar vitamin activities. Examples of vitamers of Vitamin A are retinol and retinal.

Vitamin D has three vitamers. They are Calcitriol, ergocalciferol (D2) and cholecalciferol (D3). Similarly, Vitamin E has two vitamers. They are Tocopherols and tocotrienols.

Therefore, the tocotrienols are the vitamers of vitamin E and not a vitamer of vitamin D.