Niacin belongs to which category of vitamins?

Niacin belongs to which category of vitamins?

• A. Vitamin A
• B. Vitamin B
• C. Vitamin C
• D. Vitamin D

Answer: (B)

Niacin belongs to the B vitamin family, specifically vitamin B3. B vitamins are largely water-soluble micronutrients that serve as coenzymes in energy metabolism. Niacin’s coenzyme forms, NAD+ and NADP+, shuttle electrons in many reactions that extract energy from carbohydrates, fats, and proteins. This metabolic role is typical of B vitamins, not the fat-soluble vitamins A and D or the non-B water-soluble vitamin C. Pellagra is a classic niacin deficiency, illustrating its essential role in metabolism.

Niacin belongs to the B vitamin family, specifically vitamin B3. B vitamins are largely water-soluble micronutrients that serve as coenzymes in energy metabolism. Niacin’s coenzyme forms, NAD+ and NADP+, shuttle electrons in many reactions that extract energy from carbohydrates, fats, and proteins. This metabolic role is typical of B vitamins, not the fat-soluble vitamins A and D or the non-B water-soluble vitamin C. Pellagra is a classic niacin deficiency, illustrating its essential role in metabolism.