Oral BPC at 500mcg/day for 21 days healed Tennis and Golfers elbow *for me*. Hard to pin in that area. I also (being a newb dumbass) didn't refrigerate mine. Math says 1ml of BAC, added to 5mg of BPC = 5mg/ml or 500mcg per numbered graduation (.1, .2. etc...). It's a gastric peptide, which is why oral works, *and* it can't be patented. It hasn't been tested in People, but it did work in Rats when given orally in the drinking water. At last check, Suppversity was the best source on all the latest data, but the article is about a year old now, so maybe more has come out? Pinning seems like it would be better, but the stuff worked magic when I swallowed it. As a comparison, before I went the BPC route, I tried *every* supplement that gets bandied about for joints - Cissus, Bromelain, High Dose B5, all the other "Joint" stuff, etc... NADA, 'cuz Tendons ain't joints. YMMV.