Side-by-side comparison
IGF-1 LR3
Growth Factor Analog PeptideSafety 3/10Muscle / IGF research
vs
MGF
Growth Factor Analog PeptideSafety 6/10Muscle / IGF research
IGF-1 LR3
MGF
Cheapest price
$47.99 /1mg
$50.00 /5mg
Vendors stocking
19
2
Safety rating
3/10
6/10
Mol. weight
9,117.60 g/mol
≈2,867 g/mol (24-aa synthetic form)
Administration
Subcutaneous injection
Subcutaneous injection
Price Comparison — 2026
IGF-1 LR3
VendorPrice
MGF
Vendors Carrying Both
2 vendors stock both IGF-1 LR3 and MGF — convenient if you want to bundle an order.
Safety Notes
IGF-1 LR3
FDA: Not FDA-approved (never tested in humans)
Documented animal DEATHS from prolonged (20–30h) hypoglycemia; severe acute hypoglycemia risk; cancer-proliferation concern (IGF-1 epidemiologically linked to several cancers); zero human trials; species-paradoxical responses. WADA-banned.
MGF
FDA: Not FDA-approved
IGF-1 splice variant; limited data; localized action; no proven major harms in available studies