B-complex vitamins are a group of eight essential nutrients that play a vital role in maintaining good health. These vitamins include B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate), and B12 (cobalamin). They help convert food into energy, support brain function, and promote healthy skin and hair. Each B vitamin has unique functions but often works together to support overall well-being. For example, B9 is crucial for cell division and is especially important during pregnancy, while B12 is essential for nerve health and the production of red blood cells. A balanced diet typically provides sufficient amounts of these vitamins.