What is the optimal dose of L-(+)-Ergothioneine?

The most commonly used L-Ergothioneine dose in supplements ranges between 5 and 10 mg per day, with some products offering up to 20–30 mg. Human studies so far have used doses between 5 and 25 mg daily without reporting adverse effects. While these amounts seem sufficient to support antioxidant activity and cellular protection, there is currently no established daily requirement, and the optimal dose likely depends on individual factors such as age, diet, and health status.

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