Ginkgo extract has been tested in large trials in older adults. Overall it did not prevent dementia or clearly improve memory in healthy people. It may increase bleeding risk with blood thinners.
Bacopa has several small trials suggesting modest memory gains after about 12 weeks. It can cause stomach upset, and quality varies between studies.
Lion’s mane has a few small human studies, including one in older adults with mild cognitive impairment, with limited and short-term results.
These herbs appear in products such as Pineal Guardian X and Neuro Serge. A formula that mixes many herbs has usually not been tested as a whole. If you notice memory changes, see a doctor.
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