What it is
Walnut (Juglans regia) is a large deciduous tree. In European herbal medicine, the dried leaves are the plant material assessed for traditional medicinal use.
Traditional-use context
The European Medicines Agency (EMA) recognises traditional use of walnut leaf preparations for the relief of minor inflammatory skin conditions and for excessive sweating of the hands and feet. This classification is based on long-standing use rather than strong clinical-trial evidence.
Preparation context
EMA describes dried, comminuted walnut leaf used to prepare a decoction that is applied to the skin. A medicine or herbal product should be used according to its own package instructions rather than by transferring doses from unrelated products.
Safety and precautions
- Walnut leaf medicinal preparations described by EMA are intended for external use in adults.
- Do not apply to open or seriously infected wounds without medical advice.
- If skin symptoms persist, worsen, or show signs of infection, seek medical assessment.
- Stop use if irritation or an allergic reaction develops.
Evidence note
The EMA assessment is based on traditional use. It does not mean that all walnut preparations or all claimed uses have been clinically proven.
EMA — Juglandis foliumDisclaimer: This page is for educational purposes only and does not provide medical advice. Herbal products can interact with medicines and may be inappropriate for some people. Consult a qualified clinician or pharmacist when symptoms are significant or persistent.