Which vitamins are fat-soluble?

• A. A, D, E, and K
• B. B and C
• C. All vitamins are fat-soluble
• D. Only vitamin C

Answer: (A)

Fat-soluble vitamins are those that dissolve in fats and can be stored in the body's liver and adipose tissue. They require dietary fat for efficient absorption and are carried with lipids through the intestinal wall, then stored for later use. Because they can accumulate, they don’t need to be consumed daily, but this storage also means a higher risk of toxicity with excessive intake, especially vitamins A and D. In contrast, water-soluble vitamins like the B-complex and vitamin C are not stored in large amounts and are mostly excreted in urine, so they typically need regular daily intake. The other options misclassify these vitamins or claim all vitamins are fat-soluble.