Apparently the studies that "linked" red dye #3 to some cancers were done at a dosage of about 200 times tha maximum likely dosage of .25mg/kG of body weight. OK, let's parse this out. At my body weight of close to 100kG, we are talking about a maximum dose of 25mG. In terms of what they were feeding the lab rats, we're talking about 5 grams per day, suggesting a scene of Democrats chugging bottles of food dyes because Trump wanted to ban them.
It really suggests that we need a revival of instruction about hormesis, the tendency of many chemicals to be harmless or even slightly beneficial at low doses, despite being poisons in high doses. I am again no fan of foods with a lot of red dye, but the comparison here is basically getting all of one's nutrition from foods with this dye, and then ignoring the fact that what's really dangerous is all the sugar in them.
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