Here's a review of various memory drugs:

https://healthreview.org/brain-supplement-guide?msclkid=9b0f50d201a412b315620fce39af68da

Prevagen is widely marketed, but there is little about it from major reviewers:

https://www.drugs.com/search.php?searchterm=prevagen

Symptoms of low potassium include some memory problems:

https://www.bing.com/search?q=low+potassium+symptoms&cvid=bde6609caf1040b587ab301656b68af7&FORM=ANAB01&PC=HCTS

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Sue's Lion, View