Growth Hormone

The peptide world's most familiar growth-hormone pairing runs on a specific logic: two receptors, complementary signaling, and a nightly ritual built largely outside controlled trials.

Tesamorelin is unusual: an FDA-approved drug with a defined regimen and real trial data, used by the community for a different, off-label goal. Comparing the label with the practice is where this one gets interesting.

They are often mentioned in one breath, but the peptides that raise growth hormone work through genuinely different mechanisms — and the differences matter. A guide to the growth hormone axis and the molecules that act on it.