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Cosmetic ingredient dictionary

Melatonin in cosmetics: what it is and what it does

Melatonin is a cosmetic ingredient that stops the product reacting with oxygen and going off. Open Beauty Facts finds it in 7 products, most often facial creams.

By Bravoora teamUpdated Sources checked 2 sourcesHow we check

What does Melatonin do in a product?

In a cosmetic product, Melatonin stops the product reacting with oxygen and going off. The EU’s CosIng database lists this job for it: antioxidant.

antioxidant

What other names and numbers does Melatonin have?

CAS number
73-31-4
EC number
200-797-7
CosIng reference
35204

Which products contain Melatonin?

Open Beauty Facts finds Melatonin in the ingredient lists of 7 of the 22,021 products it has a list for, most often facial creams, night creams and face serums.

  • Facial creams1
  • Night creams1
  • Face serums1

Products with it, by country of sale: United States 2 · Costa Rica 1 · United Kingdom 1 · Singapore 1.

Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Melatonin turns up, not how much of the market it is.

On these listsAntioxidants

Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors

Sources

The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.

  1. European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
  2. Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL

Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check

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