Experience Dr. Mercola Organic Lion’s Mane Mushroom Extract, formulated to support brain health, cognitive function, digestion, and immune health. Each 500 mg capsule delivers 125 mg of Beta-Glucans (25% standardization). Non-GMO, gluten-free, and soy-free. Sourced from oak and maple logs in the U.S. and Europe for richer bio-active compounds, it’s thoroughly tested to ensure a clean, potent product that matches the label. Physician-formulated since 1997.