IGF-1 LR3 vs Ipamorelin
Which should you choose? Here's what you need to know.
The short answer
Ipamorelin stimulates your pituitary to make more GH naturally. IGF-1 LR3 bypasses GH entirely and delivers a potent growth factor directly to tissues.
On 10 Oct 2026 Peptide Compare tracked 46 vendors selling IGF-1 LR3, cheapest in stock $20.83 per mg at Bio Pepz, and 59 selling Ipamorelin, cheapest $1.87 per mg at Sunrise Bioresearch.
IGF-1 LR3
Growth HormoneIGF-1 LR3 is a long-acting synthetic growth factor with ~2.5x the potency of natural IGF-1. It acts directly on muscle and tissue without requiring GH as an intermediary.
Choose IGF-1 LR3 if:
You want direct, potent growth factor effects for muscle growth and are comfortable with a more aggressive research compound.
Ipamorelin
Growth HormoneIpamorelin is a selective GH secretagogue that triggers clean GH pulses through ghrelin receptors. The GH your body produces then naturally converts to IGF-1.
Choose Ipamorelin if:
You prefer a natural, gentler approach that works with your body's GH system rather than bypassing it.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Oct 10, 2026.
IGF-1 LR3
Ipamorelin
$12.00
Starting from
$15.99
$164.45
Avg. price per mg
$8.63
46
Vendors selling it
59
40 options
In stock now
69 options
9.1/10
Top trust score
9.0/10
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Our top-rated vendor for each, based on trust scores, purity testing, and price.
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Where does this data come from?
We re-check vendor prices continuously and score vendors on Finnrick blind-test results — samples bought anonymously and sent to a lab, not vendor claims. No vendor can pay to rank higher. See our full methodology.