Thiamine, or vitamin B1, is a water-soluble vitamin whose molecule contains pyrimidine and thiazole cycles. This vit...
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Vitamin A is an essential nutrient and fat-soluble vitamin. In nature it occurs in the forms of retinol, 3-dehydrore...
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Protein, fat, and carbohydrates are the main macronutrients. Proteins are biopolymers based on amino acids interconn...
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