Links IMMUNE SHIELD-15 is the most comprehensive immunity supplement on the market. Pack with 15 clinically studied, powerful immune boosting vitamins, antioxidants and herbs, this formula boosts the body’s immune system and aids in your body’s ability to fight infection. Link’s Immune Shield-15 boosts your immune system with Vitamin C, Probiotics, Turmeric, Garlic, Olive Leaf Extract, Green Tea, Quercetin and many more