Does food dye change the color of your blood?

r/

A while back I ate a cupcake with black icing. The food dye in the icing caused my urine to change color (dramatically!) So, if urine is from filtered blood via the kidneys, does that mean the food coloring changed the color of my blood?

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  1. usafmd Avatar

    There is a story about the very first antibiotic. Dr. Domagk thought since the dye colored bacterial walls, it could be used an an antibiotic. Gerhard Domagk first tried his drug on his daughter Hildegard for a streptococcal infection. His “Prontosil” derived from a red dye, permanently colored the inventor’s daughter’s skin. She recovered from the infection, but had a permanent reddish discoloration of her skin due to the drug.

    BTW, most search engines give you penicillin as the world’s first antibiotic, which is incorrect.

    Methylene blue which is a dye and also a drug for methemoglobinemia, causes discoloration of blood, (heart and brain too!)