supplements containing usnic acid (or its sodium salt) have been implicated in fulminant hepatic failure (liver problems) in close to a dozen otherwise healthy people between the ages of 18 and 32.
It is my belief that the misuse of this supplement will dramatically and irrevocably increase the risk of cancer, promote serious anomalies of the body's cellular reproductive mechanisms, and potentially lead to the death of the user (not much different from DNP)
For the record, there are currently 28 patents on file with the US Patent Office concerning usnic acid, including its use as a fungicide, antibiotic, antineoplastic, antituberculotic, and for the treatment of leishmaniasis and coccicoides (parasitic infestation of the intestines).
A lot of studies that deal w/ usnic acid use mice (although we can extrapolate the data to men, as mice and men are both mammalian systems), usnic acid has been shown to increase clastogenic (chromosome or gene breaking) action in mouse femur (bone) cells, something that I know we all want to avoid unless we're looking forward to osteoporosis, bone cancers, and hip replacement surgery in the near future.
here's a ref:
6) J Ethnopharmacol 1991 Jul;33(3):217-20
Thanks to T-mag I did not have to repeat myself, after saying this a million times to people.
Conclusion, if you are willing to risk osteoporosis, bone cancers, or any other tumor possibilities then go ahead and use the product....I don't condone it, neither do I think it's a positive. I'm neutral, just read the above facts and make your own decision.