B-group vitamins are water-soluble vitamins necessary for human metabolism, in particular energy metabolism, the production of blood cells, and the nervous system. This group includes 8 vitamins: B1 (thiamine), B2 (riboflavin), B3 (nicotinic acid), B5 (pantothenic acid), B6, B8 (biotin), B9 and B12.
With a varied and balanced diet and a healthy lifestyle, these vitamins are primarily provided by cereals, products of animal origin and dried fruit.
During periods of temporary stress and when we are leading busy, hectic lives, the body consumes more B-group vitamins and some of them can become depleted. But B-group vitamins work as a team: their metabolisms are interconnected and they act in synergy. A sufficient and balanced intake is therefore necessary during more intense periods (physical exertion or intellectual effort).