Premier Research Labs Olive Leaf Immune delivers 500 mg olive leaf extract with turmeric and parsley to support immune and heart health naturally. Each capsule contains a minimum 20% oleuropein, the bioactive phytonutrient that powers olive leaf benefits. For daily immune and heart health support, take 2 capsules daily or as advised by a healthcare professional. 60 vegetarian capsules. Sustainably sourced, Premier-quality supplement.