Rambutan is a small size fruit but it actually packs amout of vitamin C, which helps keep immune system healthy and flush toxins out of the body.
The skin of the rambutan is slightly thicker than lychee, more difficult to peel. Its flesh is slightly firmer and not as sweet as lychee.
The yummy and juicy flesh is perfectly safe but the outside peels and inner seeds are of different story. It contain poisonous substance.