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Vitamins: Functions and Deficiencies

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Vitamin B2 (Riboflavin)

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Function: Central component of coenzymes FAD and FMN. Deficiency Symptoms: Angular cheilitis, glossitis, seborrheic dermatitis, and photophobia.

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Vitamin B5 (Pantothenic Acid)

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Function: Synthesis of coenzyme A, necessary for fatty acid metabolism. Deficiency Symptoms: Rare, but can include fatigue, insomnia, and stomach pains.

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Vitamin B1 (Thiamine)

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Function: Coenzyme in energy metabolism. Deficiency Symptoms: Beriberi, Wernicke-Korsakoff syndrome, muscle wasting, and impaired growth.

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Vitamin B7 (Biotin)

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Function: Coenzyme in the synthesis of fat, glycogen, and amino acids. Deficiency Symptoms: Hair loss, dermatitis, and neurological symptoms.

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Vitamin D

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Function: Regulation of calcium and phosphate metabolism, bone health. Deficiency Symptoms: Rickets in children, osteomalacia in adults, and risk of osteoporosis.

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Vitamin A

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Function: Essential for vision, immune function, and skin health. Deficiency Symptoms: Night blindness, dry eyes, impaired immune function, and skin issues.

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Vitamin E

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Function: Antioxidant, protects cell membranes from damage. Deficiency Symptoms: Hemolytic anemia, neurologic problems, and immune impairment.

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Vitamin B9 (Folic Acid)

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Function: DNA synthesis, repair, and methylation. Deficiency Symptoms: Megaloblastic anemia, birth defects, elevated homocysteine.

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Vitamin B6 (Pyridoxine)

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Function: Coenzyme in amino acid metabolism. Deficiency Symptoms: Anemia, peripheral neuropathy, seizures, and skin disorders.

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Vitamin C (Ascorbic Acid)

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Function: Antioxidant, collagen synthesis, immune support. Deficiency Symptoms: Scurvy, bleeding gums, bruising, and poor wound healing.

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Vitamin K

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Function: Essential for blood clotting and bone health. Deficiency Symptoms: Increased bleeding, hemorrhagic disease in newborns, and reduced bone density.

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Vitamin B3 (Niacin)

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Function: Used to produce NAD and NADP, which are vital in cellular metabolism. Deficiency Symptoms: Pellagra, involving dermatitis, diarrhea, and dementia.

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Vitamin B12 (Cobalamin)

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Function: Essential for nerve tissue health, brain function, and the production of red blood cells. Deficiency Symptoms: Megaloblastic anemia, memory loss, fatigue, and tingling in the limbs.

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