Soy is something that is best avoided or at least reduced in consumption unless it is fermented (like tempeh, natto or fermented soy sauce). Soy is high in phytic acid and trypsin inhibitors which means that it blocks the absorption of many vitamins, minerals and proteins. It also contains phytoestrogens that can mimic estrogen in the body and disrupt normal hormone function which could possibly lead to increased cancer risk.
Hemp oil and CBD oil come from different strains of the Cannabis sativa plant. The vast, and always growing, number of marijuana strains is an example of how growers can breed plants to exhibit high degrees of various traits (e.g., flavor, aroma, color, THC and CBD count). But strains can also be created that exhibit low degrees of these same traits.
My mom is late stage dementia. We have tried coconut oil/black pepper/curcumin combo for years. Gives only tine bit of help, and is not something that reverses dementia. Maybe in someone who can score better than a 14 on the mme it could be of help. But cannabinoid is a different story. Cannabinoids produce better results in less time. Can't say yet that they will reverse anything though.