01
7.8/ 10PepFinder Score
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Methylene Blue | As listed | £19.99 | — | In stock | On their site ↗ |
Prices as last checked on their site. The supplier confirms the final price and availability.
Market data · 29 suppliers · All regions
Buy Methylene Blue : 29 suppliers prices compared
29 of the suppliers we track list Methylene Blue. 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. We don't sell Methylene Blue, and we give no guidance on its use.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 · 33 listings · 28 in stock · Other compounds sold by peptide stores
GBP · 6 suppliersmedian £3.00/mg
£0.02/mg£8.00/mg
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.
Rules on buying, importing and using this product differ by country. Suppliers list it for laboratory research; nothing here is medical advice.
Showing 11 of 29 suppliers · prices in GBP only, never converted
- 02
Genetic Research
GB basedThird-party testing statedCOA page linked, not reviewed31 products tracked · Delivery Next day shipping in the UK. · Ships to 36 countries
4.0 Trustpilot(3)7.2/ 10PepFinder ScoreFrom £8.00/mg (5mg)
Listing as named Size Price Per mg Stock METHYLENE BLUE 5mg £39.99 £8.00/mg In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 03
6.9/ 10PepFinder ScoreFrom £5.00/mg (10mg)
Listing as named Size Price Per mg Stock Methylene Blue 10mg 10mg £49.99 £5.00/mg In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 046.5/ 10PepFinder Score
From £3.50/mg (20mg)
Listing as named Size Price Per mg Stock Methylene blue 20mg (100 tabs) NO LABELS CURRENTLY 20mg £70.00 £3.50/mg In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 05
Third-party testing stated42 products tracked · Delivery Spend over £100 and receive free next day delivery.
3.1 Trustpilot(2)6.5/ 10PepFinder ScoreFrom £0.02/mg (20mg x 100)
Listing as named Size Price Per mg Stock Methylene Blue (20mg x 100) 20mg x 100 £45.00 £0.02/mg In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 06
80 products tracked · Delivery We offer fast 24 hours delivery to your address with track and trace code from Royal Mail(UK).
6.4/ 10PepFinder ScoreListing as named Size Price Per mg Stock Methylene blue 10 mg, 60 caps 10 mg £57.28 — In stock On their site ↗ Methylene blue 20 mg, 60 caps 20 mg £95.59 — In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 075.5/ 10PepFinder Score
From £0.50/mg (10mg)
Listing as named Size Price Per mg Stock Methylene blue 10mg 5 pack 10mg £25.00 £0.50/mg In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 08
Third-party testing statedCOA page linked, not reviewed121 products tracked · Ships to 1 country
4.9 Trustpilot(76)5.4/ 10PepFinder ScoreListing as named Size Price Per mg Stock Methylene Blue 1% (60ml) 99.9% USP Grade 60ml £24.00 — In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 09
5.2/ 10PepFinder ScoreFrom £2.50/mg (10mg)
Listing as named Size Price Per mg Stock Methylene Blue 10mg 10mg £24.99 £2.50/mg Out of stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 10
4.5/ 10PepFinder ScoreListing as named Size Price Per mg Stock Methylene Blue As listed £29.99 — In stock On their site ↗ Prices as last checked on their site. The supplier confirms the final price and availability.
- 11
3.5/ 10PepFinder ScoreListing as named Size Price Per mg Stock Methylene Blue As listed £16.00 — 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
Set a target price and we check every validated listing daily. Free with an account.
At a glance · 25 Sept 2026
- Suppliers tracked
- 29 list Methylene Blue, 28 listings in stock
- Price per mg (GBP)
- £0.02/mg to £8.00/mg, median £3.00/mg, across 6 listings from 6 suppliers
- Test certificates
- Not yet collected by PepFinder for Methylene Blue; check each supplier's site. How to read a COA
- Legal status
- Rules differ by country. Legal status by country
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 vial and syringe calculator
Arithmetic for the vial sizes stores list: concentration after adding water, and what an amount is in units on a U-100 syringe. It does not suggest an amount. Full calculator and worked examples.
Concentration
2.5 mg/mL
25 mcg per unit on a U-100 syringe · 250 mcg per 0.1 mL
Enter an amount per draw to see how many units it is and how many draws the vial holds.
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
GBP · median per mg
No validated daily statistics yet. A trend appears once there is more than one day of data.
Catalogue changes, last 30 days
33 listings added · 0 withdrawn
- 25 Sept 2026peakwellnesspeptides.comNew listing: Methylene Blue 10mg (10mg)
- 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)
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: see legal status by country, or narrow this list to your region above.
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: questions
Where can I buy Methylene Blue?
29 of the suppliers PepFinder tracks list Methylene Blue. The highest rated are Receptor Chem, VPeptide, Genetic Research. The list on this page is ranked by PepFinder Score, which weighs reliability, delivery, pricing, support and customer reviews; nobody pays to be included or to rank higher.
How much does Methylene Blue cost?
Listed prices in GBP run from £0.02/mg to £8.00/mg, median £3.00/mg, across 6 listings from 6 suppliers. Compare price per mg rather than price per vial, and only within one currency; a price far below the rest is more often a warning than a bargain.
What sizes is Methylene Blue sold in?
Suppliers on this page list Methylene Blue in 5mg, MB - 5-mg, 60, single-vial, 10mg, 10 mg, 10 MG. 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 Methylene Blue legal to buy?
It depends on the country. PepFinder summarises the rules for the UK, the US, Canada, Australia, New Zealand and Europe, with links to the regulators' own statements. Choose a region above to see suppliers and the rules for that country.
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.