How many vitamins are required by humans?

How many vitamins are required by humans?

• A. 9 vitamins
• B. 12 vitamins
• C. 13 vitamins
• D. 14 vitamins

Answer: (C)

Humans require 13 essential vitamins. These are divided into fat-soluble vitamins—A, D, E, and K—and water-soluble vitamins—the eight B vitamins (B1 thiamin, B2 riboflavin, B3 niacin, B5 pantothenic acid, B6 pyridoxine, B7 biotin, B9 folate, B12 cobalamin) plus vitamin C. Counting these gives 13 total. Some sources note choline as vitamin-like and essential in specific situations, but the standard tally of essential vitamins is 13.

Humans require 13 essential vitamins. These are divided into fat-soluble vitamins—A, D, E, and K—and water-soluble vitamins—the eight B vitamins (B1 thiamin, B2 riboflavin, B3 niacin, B5 pantothenic acid, B6 pyridoxine, B7 biotin, B9 folate, B12 cobalamin) plus vitamin C. Counting these gives 13 total. Some sources note choline as vitamin-like and essential in specific situations, but the standard tally of essential vitamins is 13.