>A few years ago, I discovered that I had a vitamin B12 deficiency. B12 is a contributor to memory, so I was hopeful that by clearing up the deficiency, my memory would improve. I'd have to say I don't think so, but it's a pretty subjective question. At least, I can say it was not dramatic, if improved at all.

Note that for many vitamins taking supplements doesn't cut it the same way as taking them naturally through regular old food (fruits, vegetables, legumes, meat, fish, etc).

And besides B12 deficiency there could be other aspects to memory problems, including good sleep and less stress, than might even be dominant...