Which vitamin is categorized as water-soluble?

Vitamin B is categorized as water-soluble because it dissolves in water and is not stored in the body for long periods. This category includes several different vitamins, such as B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate), and B12 (cobalamin). Because they are water-soluble, these vitamins are typically lost through urine when excess amounts are consumed, which means regular intake through diet is necessary to meet the body's needs.

In contrast, vitamins A, D, and E are classified as fat-soluble vitamins. They require dietary fat for absorption and can be stored in the body’s fatty tissues and liver, making their management in the body different from that of water-soluble vitamins.