It produces red and white blood cells because of copper and manganese. And useful in anti ageing. In healthy adults, two rambutan fruits will suffice to meet their daily vitamin C requirements. Rambutan is high in dietary fibres, which help to maintain normal bowel movement after a heavy meal. The calcium in rambutan fruit is absorbed by the body's bones, assisting in the maintenance of adequate bone density for day-to-day functioning and unrestricted movement.