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Market data · 18 suppliers · United Kingdom

SS-31 prices in the UK: 18 suppliers compared

18 of the suppliers we track list SS-31 in or shipping to the UK. 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 SS-31, and we give no guidance on its use.Also listed as: Elamipretide

Prices checked 23 Sept 2026 · 23 listings · 21 in stock · Mitochondrial peptides

SS-31 · listed price per mg
GBP · 15 suppliersmedian £2.74/mg
£1.12/mg£5.90/mg

Each currency is shown separately; prices are never converted.

Regulatory status

In United Kingdom the regulator is the Medicines and Healthcare products Regulatory Agency (MHRA). Rules on buying, importing and using this product differ by country. Suppliers list it for laboratory research; nothing here is medical advice.

At a glance · 23 Sept 2026

Suppliers serving the UK
18 list SS-31, 21 listings in stock
Price per mg (GBP)
£1.12/mg to £5.90/mg, median £2.74/mg, across 18 listings from 15 suppliers
Test certificates
Not yet collected by PepFinder for SS-31; check each supplier's site. How to read a COA
Legal status in the UK
Most research peptides are not controlled drugs in the UK, but selling or supplying an unlicensed medicine is an offence under the Human Medicines Regulations 2012; growth hormone and HCG are Class C controlled drugs. Full summary with sources

What SS-31 is

SS-31, developed as the drug elamipretide, is a small synthetic peptide that concentrates in mitochondria and binds cardiolipin, a lipid of the inner mitochondrial membrane. It became the first approved treatment for the rare genetic disorder Barth syndrome when the FDA granted accelerated approval in September 2025, but a phase 3 trial in primary mitochondrial myopathy did not meet its goals. SS-31 sold online as a research peptide is not the approved product. Read the full SS-31 guide, with the published research and references.

  6. 06

    ThePeptideCode

    GB based
    Third-party testing stated
    No reviews yetFrom £1.90/mg
    7.3/ 10PepFinder ScoreRead the review →
    Listing as namedSizePricePer mgStock
    SS-31 (Elamipretide) 10mg | ≥99% Purity | UK Research Peptide10mg£18.99£1.90/mgIn stockOn their site ↗
  13. 13

    Flex Peptides

    Third-party testing statedCOA page linked, not reviewed
    No reviews yetFrom £2.50/mg
    6.5/ 10PepFinder ScoreRead the review →
    Listing as namedSizePricePer mgStock
    SS-31 (Elamipretide) 10mg10mg£24.95£2.50/mgIn stockOn their site ↗
  17. 17

    Peptides UK 4U

    Third-party testing statedCOA page linked, not reviewed
    No reviews yetFrom £1.98/mg
    5.7/ 10PepFinder ScoreRead the review →
    Listing as namedSizePricePer mgStock
    SS-31 50mg (SS31) — Research Peptide UK50mg£99.00£1.98/mgIn stockOn their site ↗

SS-31 market over time

The median listed price per mg across every tracked supplier listing SS-31 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

No SS-31 listings added or withdrawn since we began recording catalogue changes.

Before you choose a SS-31 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 SS-31 is and what published studies have found, see our SS-31 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 UK? and see all suppliers serving the UK.

Checking a SS-31 certificate of analysis

  1. The certificate names a laboratory you can find independently, and ideally one with no stake in the result.
  2. It carries a batch or lot number that matches the product page or the vial label, and a test date.
  3. It confirms identity by mass spectrometry, not only purity by HPLC. Purity alone does not show the vial contains SS-31.
  4. It includes the chromatogram and mass spectrum, not just a summary table.
  5. 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.

SS-31 in the UK: questions

Where can I buy SS-31 in the UK?

18 of the suppliers PepFinder tracks list SS-31 and are based in or ship to the UK. The highest rated are Simply Peptides, UK Peptide Lab, XL Peptides. 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 SS-31 cost in the UK?

Listed prices in GBP run from £1.12/mg to £5.90/mg, median £2.74/mg, across 18 listings from 15 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 SS-31 sold in?

Suppliers on this page list SS-31 in 5mg, 10mg, 50mg. 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 SS-31 in the UK?

Most research peptides are not controlled drugs in the UK, but selling or supplying an unlicensed medicine is an offence under the Human Medicines Regulations 2012; growth hormone and HCG are Class C controlled drugs. Our page on whether peptides are legal in the UK sets out the rules with a link to every source. This is general information, not legal advice.

Can SS-31 be shipped to the UK?

Non-controlled medicines can be imported for your own use without an import licence, but Border Force can seize quantities above reasonable personal use, and controlled drugs such as growth hormone and HCG cannot be posted to you from overseas. 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 SS-31 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 SS-31 from these suppliers, so check each supplier's own site.

How this list is built: suppliers appear because they list SS-31 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.