Multiple choice

Which of the following largely produces vitamin D in the human body?

  1. Liver

  2. Pancreas

  3. Spleen

  4. Skin

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vitamin D is synthesized in the skin when it is exposed to ultraviolet B (UVB) radiation from sunlight. The liver and kidneys then process it into its active form.