Question

There are four fat-soluble vitamins. These include vitamin A (including preformed and provitamin forms), vitamin D, vitamin E, and vitamin K. They are found in a wide variety of foods, and each has important metabolic functions. Since fat-soluble vitamins are stored in the body, large quantities (especially of vitamins A and D) can build up to the point of toxicity. Drag the appropriate items into their respective bins.

Answer 1

Vitamin A: Preformed (Retinol, Retinal) & Provitamin (Beta-carotene) from liver, fish, carrots.

Vitamin D: D2, D3 from fish, sunlight.

Vitamin E: Tocopherols, in nuts, oils.

Vitamin K: K1, K2 in greens, liver. Stored; excess A, D can be toxic.

Fat-Soluble Vitamins:

Vitamin A:

Preformed forms: Retinol, Retinal, Retinoic acid

Provitamin forms: Beta-carotene, other carotenoids

Food sources: Liver, fish oils, dairy products, carrots, sweet potatoes

Vitamin D:

Forms: D2 (ergocalciferol), D3 (cholecalciferol)

Food sources: Fatty fish, fortified dairy products, sunlight (as the body can produce vitamin D when exposed to sunlight)

Vitamin E:

Forms: Tocopherols (alpha, beta, gamma, delta), tocotrienols

Food sources: Nuts, seeds, vegetable oils, green leafy vegetables

Vitamin K:

Forms: K1 (phylloquinone), K2 (menaquinone)

Food sources: Green leafy vegetables, broccoli, Brussels sprouts, liver

Important Points:

Metabolic Functions: Each fat-soluble vitamin has specific metabolic functions, including roles in vision (Vitamin A), bone health (Vitamin D), antioxidant protection (Vitamin E), and blood clotting (Vitamin K).

Storage and Toxicity: Fat-soluble vitamins are stored in the body, and excessive intake, especially of vitamins A and D, can lead to toxicity. Monitoring intake from both dietary sources and supplements is crucial.

Question

What are the sources of preformed Vitamin A, and what are the sources of provitamin A (Beta-carotene)? List the sources of Vitamin D ,E, K .