In a double-blinded, placebo-controlled trial, Prevagen demonstrated the ability to improve aspects of cognitive function in subgroups of participants with either normal cognitive aging or very mild impairment, as determined by pre-trial screening. The group of participants taking Prevagen improved certain aspects of cognitive function according to computer-based testing. The adults were over 40 years old and took one capsule daily (10 mg) for 90 days.

The Professional Formula is 4Xs stronger than the regular strength.