Improve the immune system. For those who wish to keep a tab on their weight, the longan fruit is a healthy option to snack on. The nutritional profile of longan is different for fresh, canned, and dried fruit. Longan consists of good amount of … You'd need to walk 1 minutes to burn 2 calories. Visit CalorieKing to see calorie count and nutrient data for all portion sizes. Glycemic Index: , Calories:60, Net carbs: 15.14, Protein: 1.31. Get full nutrition facts and other common serving sizes of Longans including 1 oz and 100 g. 2. Source: USDA Fight Anemia. Richest in Vitamin C: 84mg (93% of DV), Copper: 0mg (0% of DV). 7. It is a must-have fruit for those who wish to follow a low-calorie diet. There are 2 calories in 1 Longan. Longan nutrition (100 grams). There are 2 calories in 1 fruit [0.2 oz as purchased] (0.1 oz) of Longans, raw. Longan consists of good amount of minerals like magnesium, potassium and copper so female with early osteoporosis symptoms could at least slower the degeneration of bone cells if they frequently consume longan fruit. A whole cup of longan extract will provide just 35 calories.