Where to Buy Follistatin: Vendor Comparison and Red Flags

Most "where to buy follistatin" pages skip the part that matters. They list vendors and stop. They do not show you how to read a Certificate of Analysis, what FST-344 vs FST-315 actually means on a label, or why a $40 vial of follistatin should make you close the tab.

Follistatin vendor comparison at a glance

Read the table first. Then read the asterisks.

The honest takeaway sits in two columns: variant clarity and COA availability. If a vendor cannot tell you exactly which follistatin you are buying and show you a recent batch test, the price does not matter.

For background on the protein itself, see the follistatin overview and the follistatin-344 vs 315 breakdown.

What "follistatin" on a label actually means

The word is doing a lot of work. There are at least four products commonly sold under the follistatin name, and they are not interchangeable.

• FST-344 (315 amino acids): the longer, tissue-bound form. Most peptide vendors default to this.
• FST-315 (288 amino acids): the shorter, circulating form. Less commonly stocked.
• FLGR242 and similar fragments: modified or albumin-binding versions intended for longer half-life. Sold by a small number of premium vendors.
• Recombinant human follistatin protein: glycosylated full-length protein produced by lab suppliers like STEMCELL Technologies, priced and sized for cell-culture work, not body weight dosing.

If a product page does not name the variant, treat it as unidentified. The difference matters for solubility, stability, half-life, and how the follistatin dosage math plays out.

How to read a follistatin Certificate of Analysis

A real COA is boring. That is the point.

It should be a PDF or scanned document, dated within the last six to twelve months, and tied to a specific batch or lot number that matches the vial you receive. Look for:

1. Lot or batch number, with the same number visible on the vial.
2. Mass spectrometry result confirming the molecular weight matches the variant (FST-344 sits near 35 kDa as a glycosylated protein, but synthetic peptide-style products carry their own listed mass).
3. HPLC purity chromatogram showing a clean peak with a numeric purity percentage.
4. Endotoxin or bioburden result for recombinant protein, when sold to labs.
5. The name of the testing facility, ideally one that is not a wholly owned in-house lab.

If the only "COA" is a screenshot of a number with no chromatogram, that is marketing, not testing.

BioLongevity Labs: premium pricing, premium documentation

The structure here is unusual. BioLongevity ships follistatin as FLGR242, a modified fragment designed for albumin binding, in 10 mg vials sold in pairs starting at $499. That works out to roughly $49.90 per milligram on paper, which looks cheap until you realize you are buying in 20 mg minimums.

What earns the premium is paperwork. Pre-purchase COAs from three independent labs, GMP-registered facilities, and named medical review. The shipping is same-day if you order before noon PT and free over $400.

The honest limitation: FLGR242 is not the same molecule the literature studied. If a buyer wants to follow published follistatin gene therapy or follistatin peptide human reports, FLGR242 is a near-cousin, not the original.

PureRawz: the variant spread

PureRawz is one of the few vendors that openly lists both FST-344 and FST-315 alongside each other, sometimes at different purity levels (a 99% FST-344 and an 85–95% FST-315 variant have appeared concurrently). Pricing sits between $132 and $185 per 1 mg.

A batch COA is offered and shipping is free in the U.S. on orders over $100. The disclaimer is the standard laboratory-use wording every U.S. vendor in this space carries.

Watch the purity column on the variant you are looking at — not the headline 99% number. Two products on the same site can list different purity for a reason.

BiotechPeptides, Select Peptides, and Core Peptides: the mid-market band

These three vendors sit in the same price band ($138–$166 per 1 mg of FST-344) and ship lyophilized powder in 1 mg vials. Differences are small and operational:

• BiotechPeptides lists strong amino acid and molecular-weight detail but does not publish purity numerically on the product page.
• Select Peptides advertises third-party testing and ships free over $150.
• Core Peptides lists ">99%" purity and ships free over $200, with current 1 mg vials around $138.

None of them publish batch COAs in front of the paywall, which means a buyer has to email and ask. A vendor that responds within 24 hours with a real PDF is doing fine. A vendor that sends a generic image is not.

For most readers comparing this tier, see the where to buy follistatin Reddit conversation for current shipping and reconstitution experiences.

STEMCELL Technologies and lab-grade suppliers

This is a different product category. STEMCELL Technologies sells recombinant human follistatin as a glycosylated protein at ≥95% purity, packaged in 20 µg or 100 µg vials starting around 190 EUR.

The math tells you the audience. A 100 µg vial costs roughly the same as 1 mg from a peptide vendor — about ten times more per milligram. The format is built for cell-culture experiments at picomolar concentrations, not body-weight dosing.

Institutions order it. Individuals who try to buy it run into account verification, ship-to-business-address rules, and customs paperwork. It is a legitimate purchase channel, but only for the use case it was built for.

Why follistatin on Amazon is a yellow flag

Amazon search for "follistatin" returns dietary supplements that contain the word follistatin in the product name or description but rarely contain a measurable amount of the actual protein. Common formats include:

• Egg-yolk extract powders marketed as MYO-X-style follistatin boosters.
• Multi-ingredient muscle-builder blends that mention follistatin in the marketing copy.
• Generic capsules with no peptide content and no testing.

These are not the same product as a 1 mg lyophilized vial from a peptide vendor. They might be safe, useless, or both. Buying real follistatin peptide on Amazon is not a normal purchase path, and any listing claiming to sell injectable follistatin via mainstream marketplaces is a red flag, not a deal.

Payment red flags and scam signals

Patterns repeat across peptide-vendor complaints. Watch for these before you check out.

A site can hit one of these and still be legitimate. Two or more is enough to walk away.

What a legitimate listing looks like

A clean follistatin product page tends to share the same features:

1. The exact variant in the title and in the SKU.
2. A numeric purity statement tied to the most recent batch.
3. A downloadable or on-request COA with lot number, chromatogram, and dated testing.
4. Vial size and total milligrams stated in the first paragraph.
5. Reconstitution and storage instructions stated separately from any therapeutic claim.
6. A clearly labeled "laboratory use" disclaimer near the buy button.
7. Card, ACH, and crypto options at checkout, not crypto only.

A page can market hard and still be honest. The honesty shows up in the boring fields.

Where peptide rules become legal rules

The legality angle changes the buying decision. In the U.S., follistatin is not a controlled substance, but it is also not a compounded drug a pharmacy can fill on a normal prescription. Peptide vendors sell it under laboratory-use language and do not provide dosing or reconstitution instructions, which is why this entire market reads the way it does.

If a buyer is looking for a clinical pathway rather than a peptide-vendor pathway, the legality of myostatin inhibitors page is the right read before the credit card comes out. Telehealth follistatin is not a normal offering in the U.S.; clinics that advertise it are operating at the edge of compounded-peptide guidance that has been tightening since 2023.

Price math: what a vial actually costs you

The sticker price is only half of the cost. The real number depends on dose and frequency.

For a 1 mg vial at $138 — the Core Peptides midpoint — a 100 µg working dose works out to roughly $13.80 per dose, before bacteriostatic water, syringes, and shipping. A 300 µg dose triples that to about $41.40 per dose.

A FLGR242 buyer at BioLongevity Labs is paying more per milligram-equivalent for documentation rather than for active mass. The premium is the COAs and the GMP paperwork, not extra peptide.

This is why "follistatin is expensive" can be true on a per-cycle basis even when individual vials look reasonable on the cart page. For dose context, the follistatin dosage breakdown is the right next click.

Sources and notes

• Follistatin (FLGR242) — BioLongevity Labs
• Follistatin — PureRawz
• Follistatin-344 1mg — BiotechPeptides
• Follistatin 344 1mg — Select Peptides
• Follistatin-344 1mg — Core Peptides
• Follistatin Premium Research Peptide — Northline Labs
• Human Recombinant Follistatin — STEMCELL Technologies
• Amazon search results — "follistatin"

Frequently Asked Questions