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Growth Hormone & Performance

IGF-1

IGF-1, insulin-like growth factor 1, does most of what growth hormone gets credit for. Growth hormone travels to the liver, the liver releases IGF-1, and IGF-1 is what actually makes tissue grow, which is why every compound in this category is ultimately aimed at it. As a medicine it is prescribed under the name mecasermin to children whose bodies cannot make enough of it, a rare and severe deficiency, and the registered trials on file follow that shape: burns, Duchenne muscular dystrophy, a genetic deletion syndrome, growth failure. What it is bought for — muscle in adults whose own IGF-1 is already normal — is not what any of them measured.

Last updated

Studied forStatural growth research · Anabolic signalling context · Glucose uptake effects
Strongest sourceMarked and reversible circulating insulin-like growth factor-1 elevation during teprotumumab N01 treatment fo… (human observational study)

Mechanism

Activates the IGF-1 receptor tyrosine kinase, driving PI3K/Akt and MAPK signalling; binds insulin receptors weakly.

Reported effects

What sources associate with this compound. Reported categories, not outcomes we have graded — each would need its own citation and rung.

  • Statural growth research
  • Anabolic signalling context
  • Glucose uptake effects

Dosing on file unverified

SC: 40-120 mcg/kg BID (escalating); SC: 10-20 mg/day; IV: 1-4 mg/kg single dose

Carried from a source that labels it unverified, and reproduced with that label attached. A record of what is reported, not a recommendation. No citation on this page establishes it.

Half-life, storage & sport

Elimination half-life
6 h (human, SC) — study. Clinical pharmacology in drug development 2025; children and adolescents with primary IGF-1 deficiency, single subcutaneous 0.04 mg/kg dose of mecasermin; n and sex not stated; exogenous recombinant IGF-1, not the free endogenous peptide.

The half-life on file is 6 h, measured subcutaneously. On the schedule this record states — twice daily — each dose is still at 25% of its own peak when the next is given, so the doses overlap: the peaks build to 1.33× the first.

Dosed twice daily over 2 d, each dose normalised to the first peak.
1 compounds on one time axis, each normalised to its own peak0%25%50%75%100%0 min12 h24 h36 h2 dpeaktime from the first doseIGF-1

The rise is not modelled and the axis is not a blood level. No absorption rate constant and no volume of distribution are on file, so each dose appears at full height the instant it is given, and the axis is percent of this compound's own peak.

Literature on file 8

Identity

UniProt
P01343
Sequence
GPETLCGAELVDALQFVCGDRGFYFNKPTGYGSSSRRAPQTGIVDECCFRSCDLRRLEMYCAPLKPAKSA

Caveat on these identifiers

P01343 is a secondary accession; the active UniProt entry for human IGF-1 is P05019.

Notes unverified prose

Human trials: 40-120 mcg/kg SC; 10-20 mg/day SC; 1-4 mg/kg IV (fusion protein); Human SC/IV trials; Phase 2 ARPEGGIO (scp776)

Not on file 7

7 of the 8 fields we track hold nothing on this record, and each says why. A blank field is a bug; a named absence is a finding.

Each field links to every other record missing the same thing. The full ledger holds 765 gaps across 163 records.

Listed prices 14

What 13 shops we track listed for IGF-1, read from their own public catalogues on 2026-09-14. We take no commission on these and they are not ranked by any payment — how vendors are scored.

Compare prices14 listings from 13 shops
Listed in USD
VendorSizePricePer mg
AMC Essentials 2 mg $29.99 USD $14.99/mg
Peptides Warehouse 1 mg $47.59 USD $47.59/mg
Guru Peptides 1 mg $49.99 USD $49.99/mg
Swiss Chems ships worldwide 1 mg $55.95 USD $55.95/mg
Peptides Warehouse 1 mg $71.59 USD $71.59/mg
GenX Peptides 1 mg $75.00 USD $75.00/mg
Umbrella Labs 1 mg $80.99 USD $80.99/mg
PeptidesKingdom 1 mg $89.00 USD $89.00/mg
melanotanexpress.com 1 mg $89.99 USD $125.99 USD $89.99/mg
Peptide Pros ships worldwide 1 mg $89.99 USD $125.99 USD $89.99/mg
USA Peptide Sciences 1 mg $110.00 USD $110.00/mg
PureRawz ships worldwide 1 mg $138.42 USD $138.42/mg
Behemoth Labz 1 mg $196.05 USD $196.05/mg
Nootropic Source size not listed $34.95 USD —

Prices are the vendor's own listing, reproduced with the date we read it — never converted between currencies, and compared per milligram only where the vendor states the vial size.