Mostly preclinical

Can peptides help me build muscle?

Growth-hormone secretagogues reliably raise GH and IGF-1, but the evidence that this translates into meaningful strength or muscle gain in healthy adults is thin. The better-supported use is preserving lean mass while losing fat.

Who this applies to

Problems people bring to this category

Age-related muscle loss (sarcopenia)
Lean-mass loss during aggressive weight loss
Slow recovery between training sessions
Visceral fat with normal body weight

Compounds studied

Peptides used for muscle growth & body composition

CJC-1295 + Ipamorelin

Phase I

Raises pulsatile GH and IGF-1; pharmacodynamics are well documented, but body-composition outcomes in healthy trained adults are not.

Find CJC-1295 + Ipamorelin at a tested supplier

Tesamorelin

FDA-approved

The only GHRH analogue with approval-grade trials; cuts visceral adipose tissue by roughly 15%.

Find Tesamorelin at a tested supplier

TB-500

Phase II

Used for recovery between hard sessions; human data are limited to early-phase cardiac and wound studies.

Find TB-500 at a tested supplier

Honest reading

What the evidence actually shows

GH secretagogues increase IGF-1 in a dose-dependent way; that is a biomarker, not a hypertrophy outcome.
Much of the early weight change on GH-axis compounds is water retention, not contractile tissue.
Insulin sensitivity can worsen at higher GH exposure, and carpal-tunnel-type symptoms are reported.

Expectation setting

What peptides will not do here

It will not substitute for progressive resistance training or adequate protein.
It does not produce anabolic-steroid-scale changes in muscle mass.
All GH secretagogues are prohibited in tested sport at all times.

Sources