Review (5/5): So far, so good.
Research led me to this product. It is supposed to help with thinning or weak hair. I'm not trying to be overzealous so I mixed a little with my favorite moisturizing conditioner, and leave it on as long as possible in the shower. Used it several times so far, and it seems to be helping. I haven't changed anything else, neither products nor shampooing frequency. Worth a try, and apparently not harmful even if it doesn't work. Fairly large package, I'm getting a bunch of uses from just one package, for a fair price.