Which of the following is NOT a fat soluble vitamin?

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

Answer: (C)

Understanding how vitamins are absorbed clarifies this. Fat-soluble vitamins dissolve in fats, are absorbed with dietary lipids, and are stored in the liver and body fat. This group includes vitamins A, D, E, and K. Vitamin C, by contrast, is water-soluble; it dissolves in water, is not stored in large amounts, and must be consumed regularly because excess is excreted in urine. Therefore, Vitamin C is not a fat-soluble vitamin, while vitamins A, D, and E are.