Elderberry fruit or flowers are used as dietary supplements for minor immune conditions, often served as a tea, extract, or in a capsule. There is insufficient research to know its effectiveness for such uses or its safety profile.
Raw elderberries are 80% water, 18% carbohydrates, and less than 1% each of protein and fat (table). In a 100 gram amount, elderberries supply 73 calories and are a rich source of vitamin C, providing 43% of the Daily Value (DV). Elderberries also have moderate contents of vitamin B6 (18% DV) and iron (12% DV), with no other nutrients in significant content (table).