The leaves of fresh nettles contain small proportions of the plant sterols. However they also contain high levels of the flavonal glycosides like formic and carbonic acid and quercitin, according to Dr. Christopher’s Herbal Legacy.
Various analyses about nettles reveal around 50 chemical constituents. The stinging nettle’s roots have undergone extensive studies and contain serotonin, choline, acetylcholine, histamine, two resins, sugar, albumen, gum and starch. In addition, homovanillyl alcohol, neo-olivil, secoisolariciresinol, scopoletin, steryl glyocosides, sterols and oleanol acid are present in nettles.
There are only a small number of studies that have been conducted on the seeds of the nettle plants. From those few studies, selenium, potassium, sodium, manganese, magnesium, phosphorous, calcium, copper, zinc, niacin, riboflavin, thiamin, linolenic acid were found.