Yeah, I've played with it a bit over the past couple years for some lower back tightness and then a hamstring strain that wouldn't quit. From what I've seen in my own runs and chatting with a few buddies, a lot of people stick in that 250-500mcg range daily, sometimes splitting it morning and night, but some swear by going a touch higher—like closer to 500-750mcg—if it's a stubborn tendon or ligament spot since those seem slower to respond. For my hamstring I did subq near the area and felt like the slightly bigger amount helped more than when I kept it super low for general recovery stuff. Not saying it's one-size-fits-all, just my two cents from trial and error. If you're curious about different approaches people talk about, this write-up has some decent thoughts on varying it:
https://speech-language-therapy.com/media/articles/bpc_2.html. Everyone's body reacts differently though, so starting conservative and adjusting based on how you feel makes the most sense to me. What about you guys?