Which should you choose? Here's what you need to know.
Follistatin 315 and Follistatin 344 are both growth hormone peptides, but they work differently. Compare vendor pricing and availability below.
Once you've decided which peptide fits your needs, here's how they compare on price and vendor options. Prices verified Sep 20, 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.