Natural Factors Zinc Bisglycinate - 25 mg - An easy-to-absorb zinc supplement that is gentle on the stomach, supporting the maintenance of good health. Zinc is well known for supporting and protecting the immune system, but it is also an essential trace mineral needed for numerous other functions throughout the body. In this highly absorbable, gentle bisglycinate form, zinc is bound to two glycine molecules, allowing it to be absorbed without stomach acidity or reactions with other minerals and food components in the digestive tract. It is a great choice for people with low stomach acid levels or absorption issues that increase the risk of zinc insufficiency.