01
6.3/ 10PepFinder Score
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Methylene Blue | As listed | US$16.99 | — | In stock | On their site ↗ |
Prices as last checked on their site. The supplier confirms the final price and availability.
Market data · 3 suppliers · United States
Buy Methylene Blue USA : 3 suppliers prices compared
3 of the suppliers we track list Methylene Blue in or shipping to the US. They are ranked by PepFinder Score, which combines reliability, selection, pricing, delivery, support and customer reviews, and shown with the prices they list per mg. Stores based in the US come before those shipping in from abroad, whatever their score. We don't sell Methylene Blue, and we give no guidance on its use. Only prices listed in USD are shown here; stores that price in other currencies are on All regions.Also known as Methylthioninium chloride. Stores list it under any of these names, and all of them are matched here.
Prices checked 25 Sept 2026 · 4 listings · 3 in stock · Other compounds sold by peptide stores
No priced listings with a stated quantity yet.
Each currency is shown separately; prices are never converted.
Regulatory status
Methylene blue (methylthioninium chloride) is a prescription-only medicine in many countries. Material sold as a 'research' product is not an approved medicine.
In United States the regulator is the U.S. Food and Drug Administration (FDA). Rules on buying, importing and using this product differ by country. Suppliers list it for laboratory research; nothing here is medical advice.
Showing 3 of 3 suppliers · prices in USD only, never converted
- 02
5.7/ 10PepFinder ScoreFrom US$2.97/mg (30MG)
Listing as named Size Price Per mg Stock Methylene Blue 20MG 20MG US$69.00 US$3.45/mg In stock On their site ↗ Methylene Blue Dropper 30MG 30MG US$89.00 US$2.97/mg Out of stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 03
Third-party testing statedCOA page linked, not reviewed40 products tracked · Ships to the US
Pays byCard–PepFinder ScoreListing as named Size Price Per mg Stock Methylene Blue - LA Peptides As listed US$64.99 — In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
Told when Methylene Blue gets cheaper in the US
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At a glance · 25 Sept 2026
- Suppliers serving the US
- 3 list Methylene Blue, 3 listings in stock
- Price per mg
- No priced listings with a stated quantity yet
- Test certificates
- Not yet collected by PepFinder for Methylene Blue; check each supplier's site. How to read a COA
- Legal status in the US
- The FDA treats research peptides sold for human use as unapproved new drugs and has said in 2026 warning letters that research-use-only labels do not change that. Full summary with sources
What Methylene Blue is
Methylene blue (methylthioninium chloride) is a synthetic dye first made in 1876, not a peptide, and the active ingredient of a licensed intravenous medicine for methaemoglobinaemia. At low doses it acts as an alternative electron carrier in mitochondria, which is the basis of its use as a nootropic in small trials of memory, fear extinction and bipolar depression. Its reduced form was tested in large Alzheimer’s trials that missed their primary endpoints. It is a prescription-only medicine with a boxed warning for serotonin syndrome, and the material sold by peptide stores is unlicensed. Read the full Methylene Blue guide, with the published research and references.
Methylene Blue market over time
The median listed price per mg across every tracked supplier listing Methylene Blue in each currency, recorded daily from validated listings only. Days with too few listings to publish are left out, not estimated. How we validate prices
Catalogue changes, last 30 days
32 listings added · 0 withdrawn
- 25 Sept 2026VPeptideNew listing: Methylene Blue — 10mg × 30 Caps | MTC Research (single-vial)
- 25 Sept 2026SwissChemsNew listing: Methylene Blue
- 25 Sept 2026Swiss ChemsNew listing: Methylene Blue
- 25 Sept 2026SlavicLabs.comNew listing: Methylene Blue SHOT 30 ml (30 ml)
- 25 Sept 2026Sigma CompoundsNew listing: Methylene Blue (10 MG) (10 MG)
- 25 Sept 2026Receptor ChemNew listing: Methylene Blue
- 25 Sept 2026RCpeptidesNew listing: Methylene blue USP grade 100x10mg (10mg)
- 25 Sept 2026Proforma PeptidesNew listing: Methylene Blue 10mg (10mg)
- 25 Sept 2026Precision Peptides ShopNew listing: Methylene Blue (20mg x 100) (20mg x 100)
- 25 Sept 2026ReceptorChemNew listing: Methylene Blue
Before you choose a Methylene Blue supplier
Price per mg is only half the comparison. Check that the supplier publishes a certificate of analysis for the batch it is selling, ideally from an independent laboratory, and that the certificate confirms identity as well as purity: our guide on how to read a COA shows what to look for. A price far below the rest of the list is more often a warning than a bargain; peptide prices explained sets out why.
For what Methylene Blue is and what published studies have found, see our Methylene Blue guide. Handling questions are covered in how to store peptides, and the peptide calculator converts a vial size and water volume into concentration and syringe units. Rules on buying and importing differ by country: read are peptides legal in the US? and see all suppliers serving the US.
Checking a Methylene Blue certificate of analysis
- The certificate names a laboratory you can find independently, and ideally one with no stake in the result.
- It carries a batch or lot number that matches the product page or the vial label, and a test date.
- It confirms identity by mass spectrometry, not only purity by HPLC. Purity alone does not show the vial contains Methylene Blue.
- It includes the chromatogram and mass spectrum, not just a summary table.
- Where the laboratory offers online verification of its reports, the report number checks out.
Red flags
- No certificates at all, or certificates available only “on request”.
- The same certificate used for several products or several years of stock.
- Payment only by cryptocurrency or bank transfer, with a discount for paying that way.
- A price far below every other supplier on this page.
- No company name, address or way to contact the business other than a web form.
- Vials labelled only with a code rather than the product name and strength.
How to spot a fake peptide supplier explains each of these in more detail, and third-party peptide testing covers what independent results can and cannot prove.
Vials, capsules and pre-mixed products
Most research peptides are sold as freeze-dried (lyophilised) powder in sealed vials, which is mixed with a diluent such as bacteriostatic water before use in the lab. Some suppliers also sell pre-mixed solutions, nasal sprays or capsules under the same name. These are different products with different stability and dosing, so compare price per mg only between the same form, and check which form a listing is before comparing it with the rest of the table.
Methylene Blue in the US: questions
Where can I buy Methylene Blue in the US?
3 of the suppliers PepFinder tracks list Methylene Blue and are based in or ship to the US. The highest rated are Swiss Chems, IRON Peptides, LA Peptides. The list on this page is ranked by PepFinder Score, which weighs reliability, delivery, pricing, support and customer reviews, with stores based in the US placed before those shipping in from abroad; nobody pays to be included or to rank higher.
What sizes is Methylene Blue sold in?
Suppliers on this page list Methylene Blue in 20MG, 30MG. Most research peptides are sold as freeze-dried powder in sealed vials; capsules, sprays and pre-mixed solutions are different products, so compare price per mg only between the same form.
Is it legal to buy Methylene Blue in the US?
The FDA treats research peptides sold for human use as unapproved new drugs and has said in 2026 warning letters that research-use-only labels do not change that. Our page on whether peptides are legal in the US sets out the rules with a link to every source. This is general information, not legal advice.
Can Methylene Blue be shipped to the US?
The FDA says it is illegal in most circumstances for individuals to import drugs for personal use, and shipments it considers unapproved drugs can be refused entry. Each supplier on this page shows where it is based, so you can see whether an order would cross a border.
How do I check a Methylene Blue supplier's test results?
Ask for a certificate of analysis for the batch being sold, and check that it names the laboratory, the batch number and the test date, and that it confirms identity by mass spectrometry as well as purity by HPLC. PepFinder has not yet collected certificates for Methylene Blue from these suppliers, so check each supplier's own site.
How this list is built: suppliers appear because they list Methylene Blue on their own website, read by our catalogue checks; nobody pays to be included or to move up. Ranking is by PepFinder Score. Prices, sizes and stock are as each site listed them when checked and may have changed. Provisional scores are based on incomplete research.