B-group vitamins are essential for the proper functioning of the body, they are primarily responsible for the nervous system, improve mood and intellectual performance. These vitamins are indispensable for bone marrow and gastrointestinal tract. They are very important in the metabolic processes - they participate in the process of carbohydrate absorption. Supplementation with a complex of B vitamins brings many benefits: lowers blood cholesterol levels and supports normal brain function, has a positive effect on the condition of the skin, hair (including graying and balding) and nails. Providing the body with vitamins helps to get rid of stress caused by intense lifestyle. The right dosage is of particular importance in sport. In particular, vitamins B₁, B₂, B₃ and B₆ take a special part in energy processes. They allow easier to obtain energy from burning carbohydrates and reduce the production of lactic acid. They contribute to the increase of strength and muscle mass. It is difficult to overdose vitamin B, because its excess is removed with the urine. Overdose is manifested by weakness, nausea, and sometimes an allergic reaction. Theoretically, you can satisfy the body's demand for vitamins with food consumed, but it is very difficult. We live in a hurry and usually we do not have time to take care of our health. It is worth using good quality vitamin supplements, choosing them according to your needs. Vitamin supplements support our well-being.