March 24th, 2006
food dye
The Implications Of Food Dye On Poop Color | PoopReport.com
The dye used in purplesaurus Rex is FDA Blue #5, and dye-lake red. Turns out that when metabolized in sufficient quantity, the blue dye combines with bile, and forms a brilliant green. The red, absorbing at a 595nm spectrum, is harmlessly eliminated.
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