Which vitamins are fat-soluble?

• A. B, C
• B. G, F
• C. A, D, E, K
• D. H, J

Answer: (C)

Fat-soluble vitamins are those that dissolve in fat and are stored in the body's tissues, especially the liver and adipose tissue. The vitamins that fit this group are A, D, E, and K. They require dietary fat for absorption and bile to emulsify fats for uptake. Because they can be stored, daily intake isn’t always necessary, but excess can accumulate and lead to toxicity. Deficiency often arises with fat malabsorption or very low-fat diets and affects functions tied to each vitamin: A supports vision and epithelial health; D helps calcium metabolism and bones; E acts as an antioxidant; K is essential for blood clotting factor synthesis. The other options reference nutrients that are not fat-soluble vitamins, such as water-soluble ones (which are not stored in the same way) or non-existent vitamin names, so they don’t belong to this group.