IGF1R
IGF1R IGF-1 receptor — the molecular target that 1 compounds in the wiki act on.
In one line: The receptor that the muscle-growth signal IGF-1 plugs into.
IGF1R is the dock for IGF-1, the body's powerful "build and repair tissue" signal. When IGF-1 lands here, it drives muscle growth and cell survival — and feeds into the main mTOR "build" switch.
It's a genuinely anabolic target, which is exactly why it's risky when pushed artificially: the same "grow and survive" command that builds muscle can also help tumour cells grow. Powerful, and not to be poked casually.