High strength one a day zinc supplement Contributes to the normal function of the immune system Suitable for vegetarians and vegans Holland & Barrett High Strength Zinc supplements are a great way to boost the levels of zinc in your body. They provide all the benefits of zinc in an easy to swallow one-a-day high strength tablet. Zinc contributes to the normal function of the immune system, normal fertility and reproduction, maintenance of normal vision and cognitive function.Holland & Barrett International Limited, Barling Way, CV10 7RH, UKHolland & Barrett Limited, 45 Henry St, D01 E9X8, Ireland