Doctor's Note

Check out my other “HHH” videos (Harmful, Harmless, or Helpful?) - listed below the post.

For more context, see my associated blog post: Soy milk: shake it up!

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  • Michael Greger M.D.

    Please feel free to post any ask-the-doctor type questions here in the comments section and I’d be happy to try to answer them. And check out the other “HHH” videos (Harmful, Harmless, or Helpful?). Also, there are over a thousand subjects covered in the rest of my videos–please feel free to explore them as well!

  • WholeFoodChomper

    I’m curious how applicable these findings are to humans since this study was conducted on rats. Any human evidence out there showing that people should avoid this cute little fruit? Or is your guidance on this one, precautionary based on this rat study?

    •  The phenomenon has been documented in humans. The animal study was just trying to figure out the mechanism.

      • WholeFoodChomper

        Thanks for responding! :)  Looks like star fruit is off the menu. 

  • iVegan, CPT

    The organic farmer I buy most of my food from is always offering me star fruit and saying how good it is for you. I can’t wait to share this insight with her. You are turning me into a nutritional ninja! Thanks Dr. G

  • martintaylor67

    Hi, great site! I’ve just spotted a link stating that green smoothies can cause high Oxelate levels in the body. it sounds like dis-information to me but do you have an opinion on what is being said here?

  • N_

    But spinach is also very high in oxalate content. Should spinach be avoided?

    And even my dear almonds seem to have pretty much oxalate..

  • Jonathan

    It’s not the oxalic acid that causes it, though, it would seem. Asparagus, cassava, and brussel sprouts too have oxalic acid. Starfruit has a certain neurotoxin that healthy kidneys can easily filter out with no ill effects on the consumer…but, if you have kidney issues (stones, on dialysis, whatever else), avoid Starfruit. It can kill, then.

    Better safe than sorry I suppose…but I think I’ll take a bite here and there.

    • Zuppkko

      Please add references, i’d like to see for myself. I’m writing a school project.

  • tyler

    is star fruit better for you than grapes are?

  • Zuppkko

    Is reasearch cited on this site any good?

    • Joseph Gonzales R.D.

      Hi Zuppkko. I think so they seem legit. Anything particular about one that caught your eye? Funny I am writing a page on oxalates so stay tuned for my post on the Ask the Dietitian Page. Dr. Greger has a Q&A on oxalate as well.

  • Shawn

    Would the Star Anise spice used in herbal teas be equally harmful as well?

  • Kim

    Hello, this video is outdated, and new evidence has come to light. I have included a link to a 2015 study: “Some studies show that the fruit’s neurotoxicity is due to the oxalate action; however, recent findings show that the neurotoxic effect is not only related to the high content of oxalate, but to a toxin found in it, called caramboxin, ruling out the hypothesis that the neurotoxicity is caused exclusively by the oxalate present in the fruit.” The paper link is: What are your thoughts on this? Will you be making a new video to further explain potential dangers?