Since at least 2012 this supplement has been proven in mouse models. The results are astonishing - 10% increase in muscle mass and 30% increase in strength: https://www.researchgate.net/…/228089564_Ursolic_Acid_Incre…
Given the outrageous activation of brown fat and increased energy expenditure, it’s probably a worthwhile experiment to run for the layperson. Apparently it clears fatty liver and excess energy stores in the body. The implications are tremendous. In humans, ursolic acid is already proven to have anti-cancer effect: https://cancerres.aacrjournals.org/content/60/9/2399.
Unfortunately, there isn't much incentive to further explore human research for a compound this promising, given it would at least supplant some chemotherapy and the entire array of sarcopenia/osteoporosis drugs. Thus, you'd sooner catch swamp sludge grow into a sentient being than see official organizations which are influence by pharma give it a ringing endorsement. Is it the cure? We don't know yet. But it's worth a try.