Vitamins are essential organic compounds that play a crucial role in maintaining various physiological functions. They are categorized into water-soluble and fat-soluble groups. Each vitamin has specific sources, functions, and deficiency diseases. Vitamin A, a fat-soluble vitamin, is vital for vision, immune function, and skin health. It is found in animal sources such as liver, eggs, and dairy products, as well as in plant-based foods like carrots, sweet potatoes, and spinach. A deficiency in vitamin A can lead to night blindness, xerophthalmia (dryness of the eyes), and even blindness in severe cases. Vitamin D, another fat-soluble vitamin, is crucial for calcium absorption and bone health. It is obtained from sunlight exposure, fortified dairy products, and fatty fish like salmon and mackerel. A deficiency in vitamin D can cause rickets in children and osteomalacia in adults, leading to weakened bones and increased fracture risk. Vitamin E, an antioxidant, protects cells from oxidative damage and supports immune function. It is found in vegetable oils, nuts, seeds, and green leafy vegetables. A deficiency in vitamin E is rare but can result in nerve damage, muscle weakness, and poor coordination. Vitamin K, essential for