Life Extension Zinc Caps, High Potency 50 mg, 90 veg caps ~ Gluten Free ~ Non GMO LE Certified ~ Dietary Supplement Zinc supports your body’s natural immune defenses. Research demonstrates that zinc deficiency is widespread, especially in the elderly. This deficiency may contribute to aging-related impairment of immune function—or immunosenescence. Scientists found that zinc supplementation offers an effective way to support aging immune systems, as well as healthy inflammatory and antioxidant responses. A longstanding problem is that zinc absorption can be limited1 and certain molecules in plant sources and grains can further inhibit absorption.