Take rambutan skin that had previously been dried. Wash and add a few cups of water, then boil until really boiling. Drink the stew routinely 3 times a day. Rambutan benefits are most felt when the fruit is used as a regular snack, substituting many of the unhealthy options like salted chips and sweetened foods. The natural sugars in rambutan fruit can be easily metabolized by the body and used as a source of energy.