alt Hacker Newshttps://onlinelibrary.wiley.com/doi/abs/10.1002/jor.21107
Among others. If you read the paper, it's actually apparent that there's little difference between i.p. and oral administration in terms of efficacy -- both were roughly equally effective in improving MCL ligament healing.
Admittedly the paper's in rats -- as are 99% of the others -- as there's no incentive for anybody to run human trials.
You should note that your study is not controlled.
There are two groups, those with oral administration those with sub-q administration. There is not group without administration.
This means you can't say that oral vs injected is "equally effective" because you can't assert that BPC 157 is effective at all. You can't tease out the effect size because you don't know if any or all of the MCL ligament healing was done via normal pathways