Persimmon Soap - Does it work?

With all the recalls/lawsuits on shampoos and soap, I've gone down the rabbit hole looking into alternatives. Many years ago when I traveled a lot to some very remote places, I tried solid shampoo bars. Back then it felt like  you were washing your hair with straw and grass clippings. Didn't like it at all. Fast forward to now and small companies are making good solid soap bars, using very simple ingredients. During my search I came across persimmon soap. As we age, we get a build up of oxidized lipid = old person smell. The persimmon tannins in the soap is suppose to neutralize the body odor. There isn't any solid science behind this claim, but it's been popular in Japan for years. I was at the Japanese grocery store picking up several boxes of green tea for my daughter. She flying back for one of her best friend's birthday. It dawned on me I should check and see if they had persimmon soap. Bingo! On the very bottom self  there was a whole line of soaps. The upside was they didn't cost an arm and leg either. This type of soap is very pricey online. One of the many reason it's great living is the bay area with a big Asian population.