Lion's Mane Mushroom for Cognitive Function

Research suggests that Lion's Mane mushroom may offer modest benefits for cognitive function, with the most consistent support coming from reviews and animal studies, while findings from human clinical trials remain more limited and mixed. Studies indicate that the mushroom contains bioactive compounds such as erinacines and hericenones that appear to promote nerve growth factor activity and possess neuroprotective, anti-inflammatory, and antioxidant properties, which researchers believe underlie the cognitive effects observed in laboratory and animal models. A 2025 systematic review reported a small but measurable improvement on a standard cognitive screening tool across available trials, and a separate narrative review noted promising signals for Alzheimer's-related outcomes, though both emphasized that the number of rigorous human trials remains low. The two available double-blind, placebo-controlled trials in healthy young adults produced inconsistent results — one found faster processing speed acutely while another found no broad cognitive benefit — and researchers across multiple studies consistently call for larger, longer trials before strong conclusions can be drawn.