Which vitamin is water-soluble?

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

Answer: (B)

Water-soluble vitamins dissolve in water and are not stored in the body in large amounts, so they must be taken regularly. They travel in the bloodstream and excess amounts are excreted in urine. The B vitamins, along with vitamin C, fit this category. In contrast, fat-soluble vitamins A, D, E, and K are stored in the liver and fat tissues and require fat for absorption, which is why they don’t need to be consumed every day.