Sharing this as one person's anecdote, not a recommendation, and I'm deliberately not going to post amounts or a schedule per the rules. I had a nagging Achilles issue from ramping running mileage too fast, confirmed as tendinopathy by a sports physio.
What actually moved the needle for me was the boring stuff: the physio put me on a progressive loading program (heavy slow calf work) and I finally took the deload seriously. I was also curious about BPC-157 because it's everywhere in these discussions, so I read what I could find. I want to be honest that I can't separate any peptide effect from the fact that I was, for the first time, doing rehab correctly and sleeping more.
Subjectively the morning stiffness eased over about six weeks. But that's also a completely normal timeline for tendinopathy with good loading, so I hold my conclusion loosely. Posting mostly because I see a lot of people expecting a peptide to fix a tendon while they keep aggravating it.