If you're specifically evaluating a memory supplement for an older adult, worth understanding what to check before choosing one.
Look for ingredients with research specifically in older-adult populations, not just general adult trials, since cognitive aging involves different baseline considerations than younger-adult memory performance.
This site names Lion's Mane specifically as studied in older adults for everyday cognitive function — worth reading that stated research basis as directly relevant to this specific use case, alongside this site's own stated audience of "adults, especially older adults."