Bananas Emit Antimatter Almost Every 75 Minutes

April 23, 2013 at 11:09 pm 16 comments

By Chad Upton

Potassium-40 is a fairly unstable isotope, although the half life is nearly a billion years.

Because bananas have so much of this isotope, there is enough decay to generate one positron (approximately) every 75 minutes.


A positron is basically the opposite of an electron. It has the same mass as an electron, but a positive charge instead of a negative one. It is the electron’s antimatter doppelgänger.

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photo: keepon (cc)

sources:, wikipedia (positron, gamma ray)

Entry filed under: Food and Drink. Tags: , , , , , .

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16 Comments Add your own

  • 1. disconnectd  |  April 23, 2013 at 11:30 pm

    Positively useless to the layman, yet absolutely fascinating nonetheless , Chad!!

  • 2. C.W.  |  April 30, 2013 at 9:12 am

    I started stuffing myself with bananas after reading this hoping to turn into POSITRON MAN. I’m not sure if it worked or not. I haven’t been able to leave the bathroom long enough to find out……

    • 3. bananaman  |  May 7, 2013 at 11:10 pm

      You wil become POSITRON MAN soon after ElctronMAN stuffs you with his Banana

      Ciao Bella!

  • 4. c  |  May 9, 2013 at 12:38 am

    i thought anti matter is supposed to explode when it touches matter

    • 5. dudes son  |  March 11, 2014 at 3:52 am

      It does but one atom is not really the biggest explosion

      • 6. philotumblr  |  February 12, 2022 at 10:40 pm

        The mass of an electron or positron is only a fraction of the mass of an atom – so it’s not even the size of an exploding atom

  • 7. Tyrone Sandalphon  |  May 9, 2013 at 7:32 am

    Fascinating article that got me thinking …If you eat anti-pasta and then a bowl of spaghetti….are you still left feeling hungry?

    • 8. duh  |  March 26, 2014 at 6:05 pm


      Antipasta isn’t a thing buddy

  • 9. larsjohanbjorkman  |  May 9, 2013 at 4:33 pm

    I knew something tasted funny!!

  • 10. Bananas Have More Sugar Than Mars Bars | Broken Secrets  |  November 13, 2013 at 2:02 am

    […] Bananas Emit Antimatter Almost Every 75 Minutes […]

  • 11. Willybill Duckyman (@WillyBill7)  |  November 26, 2013 at 2:05 pm

    What matter is it anti to? I understand that every matter in the universe has it’s own antimatter and if they meet they will annihilate each other.

    • 12. Peter  |  October 28, 2018 at 12:25 am

      An electron.

  • […] Bananas emit antimatter almost every 75 minutes. Ref: […]

  • […] 4. Les bananes produisent de l’antimatière. […]

  • 15. Richard Barnes  |  February 16, 2020 at 9:21 am

    Is it true you should not eat bananas before commercial flying inasmuch as the matter in bananas will set off security alarms when you go through flight screening?

  • 16. Anti-Richard  |  April 19, 2020 at 8:07 am

    Oh, good grief.

    No. It’s not true.


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