2. The carambola has high nutritional value, and contains many ingredients beneficial to human health, such as protein, fat, sugar and citric acid, as well as many vitamins and minerals. It is a kind of fruit with a lot of water, and the soluble solid content of fresh fruit is 9%. Every100g edible part contains 6.2g of carbohydrate, 7mg of vitamin C, sucrose, fructose, glucose, 46.8g of malic acid, 7.2g of oxalic acid, citric acid and vitamin B 1. B2, calcium, potassium, magnesium, trace fat, protein and other nutrients, so it is a fruit with comprehensive nutrition.