May one consume a food exhibiting triboluminescence on Shabbos? Triboluminescence is where light is created from a material being crushed, rubbed, or ripped apart.

When foods are infused with very low concentrations of Methyl salicylate, they can exhibit triboluminescence, such as LifeSavers Mints Wint O Green (which at the time of posting this question are not Kosher). Would chewing foods like this for the purpose of Achila be considered a Melacha (like Mav'ir)? What about chewing it for the purpose of creating light/demonstrating its properties?

In a similar vein, what about rubbing 2 quartz crystals together to produce light?

Life Saver exhibiting triboluminescence.

  • Wouldn’t this be similar to eating a food that has letters?
    – Chatzkel
    May 29, 2022 at 20:45
  • @Chatzkel erasing is a bona fide melakha. This is probably nothing
    – Double AA
    May 29, 2022 at 22:52
  • And yet, even so, the Mishnah berura allows it if you just eat it and it breaks in your mouth. So for sure something like this would be permitted
    – Chatzkel
    May 29, 2022 at 23:05
  • @Chatzkel so your comment should be "shouldn't this be no worse than..."
    – Double AA
    May 29, 2022 at 23:09
  • @double aa I stand corrected.
    – Chatzkel
    May 29, 2022 at 23:21


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