Fat soluble vitamins.

Fat-soluble vitamins:

  • Definition: Vitamins that dissolve in fat and are stored in liver & adipose tissue.

  • List: A, D, E, K.

  • Absorption: Requires bile salts and dietary fat.

  • Functions (one-word keywords):

    • A – Vision (retinal), epithelial health.

    • D – Calcium/phosphate metabolism, bone health.

    • E – Antioxidant, protects cell membranes.

    • K – Coagulation factor activation (II, VII, IX, X).

  • Deficiency risks: Fat malabsorption, liver disease.

  • Daily requirement (adults, approx.):

    • A: 700–900 μg

    • D: 15 μg (600 IU)

    • E: 15 mg

    • K: 90–120 μg