Rambutan Seeds | Toxic when raw, edible when roasted or boiled

Warning to the public! The following may stop you from eating the very delectable rambutan fruit forever! The yummy and juicy flesh is perfectly safe but the outside peels and inner seeds are of different story. It contain poisonous substance.

Seed testa have nephelium saponin and tannin. The compounds tannins and saponin have dual sided reputation, usefulness in medicine and other industries and the dangers of being toxic. Tannin is one of the healthy components of wine. It is known to have antiviral, antibacterial, antiparasitic, anti-inflammatory and antiulcer effect. Plant saponin is commonly used as fish poison and have some medicinal benefits as well.

No recorded deaths due to eating of rambutan seeds and peels.

Bitter and toxic when raw but edible and safe when roasted. I tried biting a seed before knowing the fact that it is poisonous. I only sensed very slight bitterness. I chewed raw peanut too and never detected any noticeable difference. I have never tried roasting it yet.

Another way to cook the seeds is by removing the seed coat or testa, boiling in water until soft, then boiling in syrup to make sweet.

Contains tallow similar cocoa butter. About more than 37% of seed is tallow. Tallow is gathered by cold pressing method. Useful for making soap and candles. Maybe a rambutan seed chocolate is possible. Not sure! I hope I can gather enough seeds to do a little crazy experiment.

Seeds are known to lower blood sugar level, expel intestinal worms and tone muscles.

The fruit skin is also known to have toxic saponin. Need to dig further details about…

Rambutan seed composition by  Augustin, M.A. Chua, B.C. 1988
37.1-38.9% crude fat – pet ether extract
2.8-6.6 crude fiber
2.6-2.9 dry ash on dry weight basis

Seeds are not poisonous according to this recent research..
Toxicity studies on rambutan (Nephelium lappaceum) seed fat and oil extracts using acute oral, dermal and irritation assays

Jirawat Eiamwat, Sareeya Reungpatthanaphong, Saranya Laovitthayanggoon, Tuanta Sematong, Paramee Pengprecha, Benjaporn Tiensong, Patthanant Natpinit



  • I ate several seeds raw because i heard it has medicinal properties. I am still alive.

  • I ate several seeds raw. I’m still alive.

  • I used to give my little dog rambutan seed, and nothing happened to him, as a matter of fact he really loved rambutan seed more than dog food.

  • hank god you made this site to inform the people of marerica that the ramuabhgtsj

    • …wat

  • so is it ok if i eat them raw?

    • Yeah. 4-5kg should be about right

  • ey yo I better not die from this shit nigga I’m finally getting into shape and I need the toned muscle, but it’s not gonna help if I die my nigga. You know what I mean?

  • I’m currently doing reseach work on rambutan seed oil to manufacture candles ,may I know how to extract seed oil?

    • thanks a lot..!

  • Hello,

    I’m currently doing research on rambutan seed.
    May I know the source of your information regarding the benefits of it?

    Thank you

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