Prices checked 10 Nov 2026 · 6 listings · 4 confirmed in stock · 2 out of stock · Other compounds sold by peptide stores
No priced listings with a stated quantity yet.
Each currency is shown separately; prices are never converted. Packs of several vials are compared per mg of the whole pack, apart from single vials.
Prices as listed on each store's site when last checked, 10 Nov 2026. Single vials only; packs and pens are compared separately below.
Median per mg
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Too few validated prices to publish
Highest per mg
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On sale now
4
of 6 stores tracked that list Melatonin in the US
Median, 30 days
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A trend appears after a second day of validated prices
The highest-ranked stores by PepFinder Score are Alpha Carbon Labs (7.3/10), Pharma Grade Peptides (6.5/10) and www.Peptides.Us (6.3/10). The lowest price per mg is at www.Peptides.Us. None of these stores has a certificate of analysis for Melatonin on file with us yet, so check each store's own site. Ranking is by PepFinder Score alone; nobody pays to appear here or to move up.
Regulatory status
Melatonin is a prescription-only medicine in the UK and most of the EU, and a dietary supplement in the US. 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.
Suppliers 1–4 of 4 with listings on sale (2 more with everything out of stock) · prices in USD only, never converted
107 products tracked · Delivery 1-5 days · Ships to 1 country · Est. 2025
From US$5.50/mg (10 mg vial)
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Melatonin | 10 mg | US$55.00 | US$5.50/mg | In stock | On their site ↗ |
Prices as last checked on their site. Packs are compared per mg of the whole pack. The supplier confirms the final price and availability.
108 products tracked
From US$4.95/mg (10 mg vial)
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Melatonin 10mg | 10 mg | US$49.50 | US$4.95/mg | In stock | On their site ↗ |
Prices as last checked on their site. Packs are compared per mg of the whole pack. The supplier confirms the final price and availability.
From US$4.50/mg (10 mg vial)
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Melatonin – 10mg | 10 mg | US$45.00 | US$4.50/mg | In stock | On their site ↗ |
Prices as last checked on their site. Packs are compared per mg of the whole pack. The supplier confirms the final price and availability.
293 products tracked · Ships to 1 country
Warning: Not confirmed as Limitless Life Nootropics Details
| Listing as named | Size | Price | Per mg | Stock | |
|---|---|---|---|---|---|
| Melatonin Peptide | As listed | US$34.00 | — | In stock | On their site ↗ |
Prices as last checked on their site. Packs are compared per mg of the whole pack. The supplier confirms the final price and availability.
Also listing Melatonin, currently out of stock: Peak Lab Peptides, CorePeptide.
Told when Melatonin gets cheaper in the US
Set a target price in USD and we check every validated listing daily. Free with an account.
At a glance · 10 Nov 2026
Melatonin is a hormone made by the pineal gland from tryptophan, via serotonin, that signals darkness to the body clock. It is not a peptide, but peptide stores sell it in 10 mg and 20 mg capsules, drops and occasionally vials alongside sleep peptides such as DSIP. Meta-analyses find it shortens the time taken to fall asleep by a few minutes and adds a few minutes of sleep, it helps jet lag when timed to the destination bedtime, and it is a prescription-only medicine in the UK but a freely sold supplement in the US. Read the full Melatonin guide, with the published research and references.
The median listed price per mg across every tracked supplier listing Melatonin 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
4 listings added · 3 withdrawn
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 Melatonin is and what published studies have found, see our Melatonin 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.
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.
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.
6 of the suppliers PepFinder tracks list Melatonin and are based in the US. The highest rated are Alpha Carbon Labs, Pharma Grade Peptides, www.Peptides.Us. The list on this page is ranked by PepFinder Score, which weighs reliability, delivery, pricing, support and customer reviews; stores shipping in from abroad are not included in the US's prices; nobody pays to be included or to rank higher.
www.Peptides.Us lists the lowest validated single-vial price per mg in the US, US$4.50/mg for a 10 mg vial, as last checked on 10 Nov 2026. The cheapest listing is not automatically the best buy: weigh it against the store's PepFinder Score, its test certificates and its customer reviews, all shown on this page.
Suppliers on this page sell Melatonin in 10 mg vials. Most research peptides are sold as freeze-dried powder in sealed vials.
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.
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.
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 Melatonin from these suppliers, so check each supplier's own site.
How this list is built: suppliers appear because they list Melatonin on their own website, read by our catalogue checks; nobody pays to be included or to move up. Ranking is by PepFinder Score, with stores that have nothing on sale after those that do. Prices, sizes and stock are as each site listed them when checked and may have changed.