Organic fruit preserve Billberry - with sweet, midnight blue billberries from wild harvesting. The billberry (Vaccinium myrtillus) is a plant of the family (Ericaceae) with about 100-150 species. The most common variety used by Alpe Pragas is the wild billberry "Vaccinium myrtillus". The fruits contain a lot of carotene, vitamin B6, vitamin C and magnesium. Due to the anthocyanins they contain they colour the mouth and the teeth blue when consumed. Anthocyanins are also known for their antioxidant and anti-inflammatory properties.