Vitamin B refers to a group of water-soluble vitamins that play essential roles in cell metabolism. This group includes several different vitamins, such as B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate), and B12 (cobalamin). Each of these vitamins contributes to various bodily functions, including energy production, red blood cell formation, and maintaining a healthy nervous system. These vitamins are commonly found in a variety of foods. Good sources include whole grains, meat, eggs, dairy products, legumes, seeds, and leafy green vegetables. A balanced diet typically provides sufficient amounts of vitamin B, but some individuals may require supplements, especially those with specific dietary restrictions or health conditions.