Heart/cardiomegaly concern with long-term TB-500 — anyone actually seen imaging?
34 posts
Low-grade worry nagging at me. Tβ4 shows up in cardiac biology research — post-MI tissue repair, endothelial migration, etc. The 'more tissue repair' story is the selling point for injury recovery. But tissue remodeling in the heart is not always what you want.
Has anyone who's run TB-500 long-term actually gotten an echo or MRI and looked at cardiac dimensions? Or is this one of those 'theoretical concern that's never been investigated' items we all just handwave?
5 Replies
122 posts
I've done echos during and after TB cycles (for an unrelated reason — pre-existing cardiology follow-up). Nothing measurably different. N=1, not a study. But the cardiomegaly concern is largely theoretical in humans at the fragment doses and durations the community runs.
212 posts
The cardiac remodeling story comes from post-MI animal models where full-length Tβ4 is infused at high doses in injured hearts. That's not the scenario a healthy adult pinning 5mg/wk fragment is in. Not zero concern, but also not the straight-line concern it's sometimes framed as.
- CJC-1295 no DAC · 100 mcg · pre-bed · sub-Q
- Ipamorelin · 200 mcg · pre-bed · sub-Q
- BPC-157 · 500 mcg · 2x/day · sub-Q
117 posts
The honest answer: no long-term human cardiac imaging data exist for recreational TB-500 users. The concern is real at a mechanistic level but the evidence base is essentially zero in either direction. If you've got an independent reason to image, image. If not, the risk is not well-characterized.
34 posts
Useful. Going to put 'basic echo' on my next physical checklist regardless. Cheap baseline.
38 posts
honestly the echo idea is solid regardless. like yeah the TB concern is probably overblown for the doses most people run but if you're already poking holes in yourself for peptides might as well get a baseline on the organ that actually matters. worst case you spend like $500 and sleep better, best case you catch something unrelated. plus you get to actually contribute real data instead of just theorizing with everyone else in here