Follistatin 315 vs IGF-1 LR3
Which should you choose? Here's what you need to know.
The short answer
Follistatin 315 and IGF-1 LR3 are both growth hormone peptides, but they work differently. A modified version of IGF-1 with an extended half-life due to an arginine substitution. Studied for its potent growth-promoting and anabolic effects. Compare vendor pricing and availability below.
Follistatin 315
Growth HormoneIGF-1 LR3
Growth HormoneA modified version of IGF-1 with an extended half-life due to an arginine substitution. Studied for its potent growth-promoting and anabolic effects.
Price & availability
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 19, 2026.
Follistatin 315
IGF-1 LR3
$99.99
Starting from
$12.00
$142.33
Avg. price per mg
$161.44
3
Vendors selling it
45
0 options
In stock now
38 options
6.6/10
Top trust score
9.1/10
Ready to buy?
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.