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Growth Hormone

Follistatin-344

Follistatin-344 (FST-344)

Preclinical

A myostatin-blocking research protein studied for promoting muscle growth by removing a natural brake on muscle development, rather than stimulating growth hormone.

GHRP-2

Growth Hormone Releasing Peptide-2

Approved (multiple countries)

A potent growth-hormone-releasing peptide, used in Japan as a diagnostic test for growth hormone deficiency. Also mildly stimulates appetite, unlike some newer alternatives.

GHRP-6

Growth Hormone Releasing Peptide-6

Research Phase

One of the original growth-hormone-releasing peptides, known for combining strong GH stimulation with a pronounced appetite-boosting effect.

Hexarelin

Hexarelin (Examorelin)

Research Phase

One of the most potent growth-hormone-releasing peptides studied, with a distinct cardioprotective effect separate from its GH-stimulating activity.

Ibutamoren

Ibutamoren (MK-677)

Research

A once-daily pill that raises growth hormone the same way injectable growth hormone-releasing peptides do — but it's chemically a small molecule, not an actual peptide, which is why it can be taken orally.

IGF-1 LR3

IGF-1 LR3 (Long Arg3-IGF-1)

Research

A heavily modified, long-lasting version of IGF-1 — the hormone that does most of growth hormone's actual muscle-building work — engineered to stay active in the body far longer than the natural version.

MGF

Mechano Growth Factor (IGF-1Ec)

Research

A natural muscle-repair signal your body releases after intense exercise or injury. The synthetic version sold online is chemically unstable and breaks down almost immediately.

PEG-MGF

Pegylated Mechano Growth Factor

Preclinical

A pegylated, longer-acting version of MGF, engineered to overcome standard MGF's extremely short stability window.

Sermorelin

Sermorelin (GRF 1-29)

FDA Approved

A growth-hormone-releasing peptide that was actually FDA approved decades ago — the brand was pulled from the market for business reasons, not safety concerns, and it's still available today through compounding pharmacies.

Tesamorelin

Tesamorelin

FDA Approved

One of the few growth-hormone peptides that's actually FDA approved — but only for a specific fat-redistribution condition in HIV patients. Any other use is off-label.