In a double-blinded, placebo-controlled trial, Prevagen demonstrated the ability to improve aspects of cognitive function in subgroups of participants who were cognitively normal or mildly impaired. The group of participants taking Prevagen improved according to computer-based testing. The adults were over 40 years old and took one capsule daily for 90 days. Apoaequorin, the unique, high quality ingredient in Prevagen, has undergone extensive 3RD PARTY SAFETY TESTING. Tests for allergenicity and toxicity have been conducted. Third party experts agree that PREVAGEN IS SAFE. Prevagen Regular Strength is not a drug and DOES NOT REQUIRE A PRESCRIPTION. It comes in an EASY TO SWALLOW small, vegetarian capsule. For best results, just take ONE A DAY, in the morning, with or without food. According to a 2018-2019 survey conducted by Pharmacy Times of pharmacists who recommend memory support products, Prevagen was the 1 RECOMMENDED MEMORY SUPPORT BRAND. Prevagen is America's 1 selling brain health supplement according to Nielsen data.