Rowan is famous for its high content of vitamin C and carotene. It also contains a lot of organic acids and amygdalin, which increase the acidity of the stomach with a lack of hydrochloric acid and help digest food. Amygdalin also showed an analgesic effect in some experiments.

This berry is useful for digestion – pectins improve the condition of the gastrointestinal tract, reduce gas formation, and sorbitol causes a slight laxative effect. It is useful for intestinal atony and constipation. Rowan has a bile and diuretic effect.
Rowan is also ahead of most berries and fruits in terms of flavonoid content. Namely, routine, quercetin, etc. Flavonoids are excellent antioxidants that affect the whole body as a whole. They protect the cells of the body from the aggressive effects of free radicals, which destroy them, causing premature aging and cell mutations.

Extracts from berries and leaves of mountain ash destroy microbes and fungi. Research is underway on the possible use of this source of antimicrobial agents.