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
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.
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
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human observational
Marked and reversible circulating insulin-like growth factor-1 elevation during teprotumumab N01 treatment for thyroid eye disease with limited correspondence to glycemic changes. graded on: an observational human design — read from the indexed abstract — “retrospective”
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human observational
Serum insulin-like growth factor-1 concentrations are not reduced in Pomeranian dogs with Alopecia X: a case-control study. graded on: an observational human design — “case-control”
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human case series
Pharmacogenetic hypersensitivity to somatropin in a child with severe growth hormone deficiency and MC4R p.V166I variant. graded on: single case report of somatropin hypersensitivity with MC4R variant — read from the abstract — “abstract review”
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human observational
NCT00673309: Assessment of Mechanisms of Improved Wound Healing of Anabolic Agents and Diet in Severely Burned Patients graded on: a registered clinical study — “clinicaltrials.gov”
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human observational
NCT01207908: IGF-1 Therapy and Muscle Function in Duchenne Muscular Dystrophy graded on: a registered clinical study — “clinicaltrials.gov”
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human observational
NCT01525901: A Double-Blind Placebo-Controlled Crossover Trial of Insulin-Like Growth Factor-1 (IGF-1) in Children and Adolescents With 22q13 Deletion Syndrome(Phelan-McDermid Syndrome) graded on: a registered clinical study — “clinicaltrials.gov”
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human observational
NCT00330668: Recombinant Human Insulin-Like Growth Factor-1 (IGF-1) Treatment of Children With Growth Failure Associated With Primary IGF-1 Deficiency: An Open-Label, Multi-Center, Extension Study graded on: a registered clinical study — “clinicaltrials.gov”
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human observational
NCT00684957: Differential Effects of rhGH vs. rhIGF-1 on Cardiovascular Risk Factors in Adult Patients With Growth Hormone Deficiency graded on: a registered clinical study — “clinicaltrials.gov”
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.
- molecular weightnothing we hold supplies it
- molecular formulanothing we hold supplies it
- CAS registry numbernothing we hold supplies it
- PubChem identifiernothing we hold supplies it
- SMILES stringnothing we hold supplies it
- InChInothing we hold supplies it
- InChI keynothing we hold supplies it
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
| Vendor | Size | Price | Per 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 |
$89.99/mg |
| Peptide Pros ships worldwide | 1 mg | $89.99 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 | — |
None of these shops lists your destination. Choose “Show all” to see every listing we hold.
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.