The fruits of the Italian walnut (*Juglans regia*): botanical characteristics, nutritional composition, and both time-honored and contemporary culinary applications
Alicja Kowalska
2026-03-16
6 min. read
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The Italian walnut, scientifically designated as *Juglans regia*, constitutes a deciduous tree species with an extensive geographical distribution spanning not only Central Europe but also regions of North America, the Indian subcontinent, and China. These long-lived specimens—capable of enduring for up to four centuries—attain remarkable dimensions, reaching heights of fifteen meters or more. Their broad, dense canopy, composed of expansive, deep-green foliage, effectively shields the developing fruits throughout the summer months. Seasoned foragers, attuned to the optimal harvest window, comb the forest floor during the latter half of September, when descending leaves reveal the concealed, prized nuts beneath.
Italian walnuts
In fact, nuts with a high fat content (above 60 g per 100 g) have a high calorie content of 700 kcal/100 g. That's a lot, but the recommended dose, which causes positive changes in the body, occurs when you consume nuts as early as 30 to 40 g per day. This amount of nuts doesn't ruin the calorie balance, and a similar amount of energy is completely opposed to the unconsciously low fat content of our body.
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