Wednesday, April 05, 2023

Fat-soluble vitamins

Vitamins are micronutrients which are necessary for everyday healthy functioning of the body. They are organic substance, not synthesized within the body, that are essential in small amounts for the maintenance of normal metabolic functions.

Classification is based on solubility
-Water-soluble vitamins
-Fat-soluble vitamins

Characteristics of fat-soluble vitamins
-Dissolve in lipids
-Stored in tissues
-Require bile for absorption
-May be toxic in excess

Fat soluble vitamins can be stored in body -regular supply not needed. Fat-soluble vitamins are stored in the liver and fatty tissues. Water-soluble vitamins travel into the blood and stored in water-filled parts of body, e.g.; kidney

Vitamins A, D, E and K are fat soluble. Their absorption from the intestinal tract is associated with that of lipids, and a deficiency state may be caused by conditions that impair fat absorption. Fat soluble vitamins can accumulate to toxic levels if large amounts ingested.

Vitamin A
Also known as retinol, retinal, retinoic acid. Vitamin A is involved in vision, growth, reproduction, healthy skin, regulate immune system, and tissue differentiation.

Vitamin D
Functions: Hormone-like, mineralization of bones, cell metabolism

Vitamin E
Vitamin E functions:
-Fat-soluble antioxidant
-Protects cell membranes in body tissues and blood
-Participates in immune system

Vitamin K
Vit K functions
-Blood Clotting
-Bone formation
Fat-soluble vitamins

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