Antioxidant

Ergothioneine

INCI · Ergothioneine · also EGT, L-Ergothioneine

Revelika safety grade

Overview

A sulphur-containing amino acid derivative concentrated in certain mushrooms, which the body takes up through a dedicated transporter. In formulas it acts as a stable antioxidant, often paired with vitamin C or E to spread the workload.

Who it's for

Antioxidant serums aimed at dullness and environmental stress, on most skin types.

Cautions

Human topical evidence is still thin compared with the laboratory data, and it is an expensive raw material often used at token levels.

Suitability
Suits skin type
Dry Oily Combination Sensitive Acne-prone Mature Normal
Concentration
Concentration0 – 10%
Effective from
Max safe
In the glossary
Frequently asked
What does Ergothioneine do in skincare?

A sulphur-containing amino acid derivative concentrated in certain mushrooms, which the body takes up through a dedicated transporter. In formulas it acts as a stable antioxidant, often paired with vitamin C or E to spread the workload.

Is Ergothioneine considered safe for skin?

Human topical evidence is still thin compared with the laboratory data, and it is an expensive raw material often used at token levels.

RRevelika

A science-forward beauty ingredient encyclopedia. Every entry is written from published research and graded conservatively before it publishes.

Editorial standard

Content is educational, not medical advice. When evidence is uncertain we say so — and we default to caution on pregnancy safety.

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© 2026 REVELIKA · Built by ThirteenTabsEvidence-based · written from published research, graded conservatively