Kvitamiinide

Vitamins are organic compounds essential for normal growth and nutrition, required in small quantities in the diet because they cannot be synthesized by the body in sufficient amounts. They play crucial roles in various bodily functions including metabolism, immunity, and cell development. Vitamins are classified into two main categories: fat-soluble vitamins (A, D, E, K) which are stored in the body's fatty tissues and liver, and water-soluble vitamins (B-complex and C) which are not stored and need regular replenishment through diet. Fat-soluble vitamins are absorbed with dietary fats and can accumulate to toxic levels if consumed excessively, while water-soluble vitamins are excreted in urine, making deficiencies more common with inadequate intake. Most vitamins are obtained from a balanced diet rich in fruits, vegetables, whole grains, and proteins, though some may require supplementation in certain health conditions. Vitamin deficiencies can lead to various health problems, ranging from mild to severe, depending on the vitamin involved and the duration of deficiency.