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Side-by-side comparison

IGF-1 LR3

Growth Factor Analog PeptideSafety 3/10

Muscle / IGF research

vs

PEG-MGF

Growth Factor Analog PeptideSafety 6/10

Muscle / IGF research

IGF-1 LR3
PEG-MGF
Cheapest price
$47.99 /1mg
$25.20 /2mg
Vendors stocking
19
7
Safety rating
3/10
6/10
Mol. weight
9,117.60 g/mol
MGF core ≈2,867 g/mol + PEG (variable)
Administration
Subcutaneous injection
Subcutaneous injection

Price Comparison — 2026

IGF-1 LR3

VendorPrice
SomaChems$47.99 /1mgBuy →
Guru Peptides$54.99 /1mgBuy →
Amino Club$55.99 /1mgBuy →
LA Peptides$59.99 /1mgBuy →
Pinnacle Peptide Labs$67.99 /1mgBuy →
Modern Aminos$68.00 /1mgBuy →
+13 more vendors →

PEG-MGF

VendorPrice
Core Peptides$25.20 /2mgBuy →
UK Peptides$29.60 /2mgBuy →
BioLongevity Labs$37.99 /2mgBuy →
Modern Aminos$38.00 /2mgBuy →
Guru Peptides$38.99 /2mgBuy →
SomaChems$39.99 /2mgBuy →
+1 more vendors →

Vendors Carrying Both

6 vendors stock both IGF-1 LR3 and PEG-MGF — convenient if you want to bundle an order.

Core PeptidesIGF-1 LR3: $150.00PEG-MGF: $25.20Visit →
UK PeptidesIGF-1 LR3: $79.56PEG-MGF: $29.60Visit →
Modern AminosIGF-1 LR3: $68.00PEG-MGF: $38.00Visit →
Guru PeptidesIGF-1 LR3: $54.99PEG-MGF: $38.99Visit →
SomaChemsIGF-1 LR3: $47.99PEG-MGF: $39.99Visit →
PeptuviaIGF-1 LR3: $490.00PEG-MGF: $126.00Visit →

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.

PEG-MGF

FDA: Not FDA-approved

PEGylated MGF; extended half-life; limited data; no proven major harms; sourcing quality main concern

Explore Further

IGF-1 LR3

Full profile →Cheapest deals →

PEG-MGF

Full profile →Cheapest deals →
All current deals →Browse all peptides →
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