Lamberts® one-a-day vitamin b-50 complex is a high potency comprehensive formula providing all the important b vitamins that came out top in an independent analysis. It is our most popular b complex with all the b’s presented at much higher levels than you will find in typical supermarket products. These higher levels are frequently recommended by nutritionists. Several of the b vitamins are known to contribute to the normal functioning of the immune system and to normal psychological function. Others are recognised as contributing to the reduction of tiredness and fatigue as well as the maintenance of normal skin. High strength b vitamin complex. The nutritionists choice.