What is vitamin? Explain its role in human body. Differentiate between water soluble and fat-soluble vitamins.

Vitamins are organic compounds that are essential for normal physiological function, growth, and development. They are required in small amounts by the human body and must be obtained from the diet, as the body cannot synthesize them in sufficient quantities. Vitamins play crucial roles in various biochemical processes, such as enzyme activation, energy production, and immune function. They are classified into two broad categories based on their solubility: water-soluble and fat-soluble vitamins.

### Role of Vitamins in the Human Body
Vitamins support numerous biochemical reactions in the body. They are coenzymes or cofactors in various metabolic pathways that are vital for energy production, growth, and repair. Some vitamins, such as vitamin A, D, E, and K, are involved in maintaining the integrity of ____ __________ _____ _____ ________ ___ __________ _______ _______ ____.
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