Blueberries contain trace elements - sodium, potassium, calcium, magnesium, phosphorus, iron, manganese. Polyphenolic compounds in blueberry are represented by anthocyanins, leucoanthocyanins and catechins. The number of polyphenolic compounds increases with better illumination of plants. In the ripened fruit, there are more anthocyanins, in the half-ripened fruit there are more catechins and leucoanthocyanins.
Blueberries have astringent, antioxidant, anti-inflammatory, antimicrobial, antispasmodic, restorative properties. Blueberry berries also reduce the sugar content in the blood. They increase the acidity of gastric juice, improve digestion, have a beneficial effect on salt and carbohydrate metabolism, improve the blood supply to the retina of the eyes. Anthocyanins from bilberry fruits reduce thrombogenesis. Blueberry kapotinoids improve night vision.