06/17/2026
Peptides are not for everyone.
If you have active cancer, a history of cancer, or an autoimmune condition, this matters more than any gray-market warning label will ever tell you.
Most of the popular peptides work by signaling growth and repair. BPC-157 drives angiogenesis — new blood vessel formation. Growth hormone secretagogues push IGF-1 up. That's exactly what you want when you're healing a tendon. It's the opposite of what you want when there are cells in your body you don't want fed.
Autoimmune is its own problem. Several peptides modulate the immune system directly. When your immune system is already attacking your own tissue, deliberately nudging it is a gamble most people are never told they're taking.
This isn't fear-mongering. It's the conversation that should happen before the first injection, not after.
A tool that heals one person can accelerate the exact thing another person needs to stop.