Which should you choose? Here's what you need to know.
Follistatin 315 and IGF-1 DES are both growth hormone peptides, but they work differently. A truncated form of IGF-1 missing the first three amino acids. Has a shorter half-life but higher potency than standard IGF-1. Compare vendor pricing and availability below.
A truncated form of IGF-1 missing the first three amino acids. Has a shorter half-life but higher potency than standard IGF-1.
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 18, 2026.
Our top-rated vendor for each, based on trust scores, purity testing, and price.
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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.