Valupak Brewers Yeast Tablets x 120 is an excellent source of all the major B vitamins (except B12). Brewers Yeast has been shown to help people having difficulty with fatigue, sleeping and has been used to treat diarrhoea. 120 tablets. An excellent source of all the major B vitamins. Can help with fatigue, sleeping and diarrhoea. Valupak Brewers Yeast Tablets are free from added sugar, starch and gluten. No artificial colourings, preservatives or additives of any kind are used.