What is walnut leaf (Juglandis folium) used for?

What are walnut leaves used for?

Walnut is common in gastronomy since ancient times - it is a tasty ingredient in cakes, desserts, salads and food. The use of this stone fruit does not end only with gastronomy, it is widely used in herbal medicine as well.

Thus, it is not only the ripe walnut fruit that is healthy, but also the shell, fruit and leaves. That is why it is not surprising that since before the birth of Christ people drank tea from walnut leaves (Juglandis folium). The leaves are best when harvested during June and July before the walnuts ripen.

There can be a bit of confusing information about walnut leaves , as fresh walnut leaves are primarily suitable for stomach problems, stomach pains and cleansing the body of intestinal parasites, due to their higher composition of substances with antimicrobial properties.

What is the benefit of walnut leaves ?

Dried leaves also have antimicrobial properties, but a higher composition of tannins than fresh leaves, and are therefore more used for their tissue-shrinking effect, for example in diarrhea and excessive sweating. Dried leaves are also suitable in baths, for example, for inflammatory skin changes, acne, eczema and fungal infections.

The European Medicine Agency writes the following about walnut leaves :

"The HMPC concluded that, on the basis of its long-standing use, walnut leaf can be used for the relief of minor inflammatory conditions of the skin and to reduce excessive sweating of the hands and feet. The HMPC conclusions on the use of walnut leaf medicines for minor inflammatory skin conditions and excessive sweating are based on their 'traditional use'. This means that, although there is insufficient evidence from clinical trials, the effectiveness of these herbal medicines is plausible and there is evidence that they have been used safely in this way for at least 30 years (including at least 15 years within the EU).

The HMPC also noted studies in laboratory tests, which showed that walnut leaf has antimicrobial effects.”

Source:
https://www.ema.europa.eu/en/medicines/herbal/juglandis-folium

What are the active substances in Walnut leaves?

Dried walnut leaves contain up to 10% tannins and are excellent in the fight against diarrhea. Tannins act astringent along the entire digestive tract, therefore preventing fluid leakage and protecting us from dehydration.

Note that the tea is bitter! In addition, the tannins give a feeling of tightness and dryness in the mouth precisely because of their astringent effect. The astringent effect is good for excessive sweating, as it tightens the pores. However, against strong sweating, you should increase the amount of tea to two to three cups per occasion.

Walnut leaves also contain a small proportion of vitamin C (up to 1%), but these disappear at 60 degrees. Therefore, it is good with a small supplement with a few drops of lemon. Vitamin C will reduce the interfering effect that tannins have on iron absorption.

If you have a rash on your skin, fill the tub with very hot water and pour plenty of walnut leaves into the bath water, then lie in that bath for about half an hour.

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