ThePeptide.expert
Database

Peptide profiles.

Filter by category, search by name. Each profile is graded on a five-tier evidence scale.

11 profiles

Sermorelin

GHRH(1-29) / Geref

FDA approved
injectable
Evidence

The original FDA-approved GHRH analogue. Stimulates natural GH production through your own pituitary gland. Most natural approach to growth hormone optimization available.

Tesamorelin

Egrifta / Stabilized GHRH / GHRH analogue

FDA approved
injectable
Evidence

The most clinically validated GHRH analogue available. FDA-approved for visceral fat reduction. Emerging data for cognitive protection in early Alzheimer's and MCI. Widely prescribed off-label for body composition and longevity.

Ipamorelin

Growth Hormone Secretagogue (selective)

Cat 1 — 2026
injectable
Evidence

The most selective GH secretagogue available. Stimulates strong growth hormone release with minimal cortisol or prolactin side effects. Considered the gold standard secretagogue.

CJC-1295 / Ipamorelin Stack

CJC-Ipa / GH Stack / Secretagogue Combination

Cat 1 — 2026
injectable
Evidence

The most commonly prescribed GH secretagogue combination in US longevity medicine. CJC-1295 provides GHRH stimulation while Ipamorelin provides ghrelin receptor stimulation — two complementary pathways for natural GH optimization.

Ipamorelin

Growth Hormone Secretagogue (selective) / GHS

Cat 1 — 2026
injectable
Evidence

The most selective growth hormone secretagogue available. Stimulates strong GH release with minimal cortisol or prolactin side effects. Gold standard for GH axis optimization.

GHRP-2

Growth Hormone Releasing Peptide-2 / Pralmorelin

RUO only
injectable
Evidence

Potent GH secretagogue with stronger GH pulse than Ipamorelin but significant cortisol and prolactin elevation. Largely replaced by Ipamorelin in clinical settings.

GHRP-6

Growth Hormone Releasing Peptide-6

RUO only
injectable
Evidence

Early GH secretagogue notable for strong appetite stimulation via ghrelin pathway. Studied for cachexia and muscle wasting. Also has gastroprotective properties similar to BPC-157.

IGF-1 LR3

Insulin-like Growth Factor-1 Long R3

RUO only
injectable
Evidence

Modified IGF-1 with 3x longer half-life. Directly stimulates muscle protein synthesis and satellite cell activation independent of the GH axis. Significant cancer risk concern.

Follistatin-344

FST-344 / Myostatin Inhibitor

RUO only
injectable
Evidence

Myostatin inhibitor studied for exceptional muscle growth by blocking the body's natural muscle-growth limiter. Dramatic animal model results. Significant organ growth safety concerns.

Gonadorelin

GnRH / Luteinizing Hormone-Releasing Hormone / Lutrepulse

FDA approved
injectable
Evidence

FDA-approved GnRH analogue. Maintains testicular function and fertility during testosterone replacement therapy. Standard component of TRT protocols to prevent testicular atrophy.

Kisspeptin-10

KP-10 / Metastin fragment

RUO only
injectable
Evidence

Hypothalamic peptide that drives GnRH pulsatility — the most upstream signal in the entire reproductive hormone cascade. Studied for libido fertility and hypogonadism research.