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Why do walnuts turn purple when you put them in foods?

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Why do walnuts turn purple when you put them in foods?

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  1. They... dont?


  2. The element vanadium creates a purple dye when exposed to germanium, the key chemical in the juglans regia, better known as the walnut.

  3. I've never had that happen.

  4. :S  Since when?  What are you putting them in?
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