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giuliomagnifico OP t1_isz8v2m wrote

Reply to comment by congenitally_deadpan in Researchers have developed a way to include an unobtrusive edible tag (QR code) embedded inside the food that can be read without having to first destroy the food and the tag doesn’t change the outer appearance or taste of the food at all by giuliomagnifico

If you read the link you will notice that this method could be used only with 3D printed food, you print the QR with the food.

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