In any case, the bioavailability of ursolic acid is very low, at around 1%. So although you get around 50 mg of ursolic acid in an apple peel, very little is actually absorbed, which may be a good thing if there are DNA damage issues.
The melting point of UA is very high -- 285 to 288 °C -- and it's very hydrophobic, thus the solubility in water is low. Possibly the Venezuelans have modified it to be more hydrophilic and thus more soluble. UA is reasonably soluble in warm ethanol -- 5 mg/ml -- so one ounce of pure ethanol could dissolve 140 mg of UA. This could then be mixed into olive oil to keep it from craping out. UA's solubility in DMSO is about 5 times higher.
Edited by Turnbuckle, 27 October 2020 - 06:45 PM.