Holland & Barrett Mega B-50 its High Strength which is excellent source of B vitamins including (Vitamins B1, B2, B3, Pantothenic acid, B6 and B12) vitamin B complex play a vital role in maintaining good health and well-being. As the building blocks of a healthy body, B vitamins have a direct impact on your energy levels, brain function, and cell metabolism. These caplets are suitable for vegans and vegetarians.