Appeal to nature isn't a fallacy, it is a rhetorical device and can be a completely logical razor.
The appeal is to have a diet more in line with our evolutionary past. If we want a yellow food dye should we:
A) derive it from something humans have been eating for hundreds of thousands of years and that a couple studies have confirmed is probably safe...
B) derive it from petroleum (as current US yellow food dye is) that a couple studies say is probably safe.
Who the hell would take B? Unless we believe that our studies are infallible, all encompassing and perfectly established and executed the first will always be a better option. Time and time again we see that things previously thought safe are not but I would argue it is far far rarer to see that on the more naturally derived side of food.
Appeal to nature isn't a fallacy, it is a rhetorical device and can be a completely logical razor.
The appeal is to have a diet more in line with our evolutionary past. If we want a yellow food dye should we:
A) derive it from something humans have been eating for hundreds of thousands of years and that a couple studies have confirmed is probably safe...
B) derive it from petroleum (as current US yellow food dye is) that a couple studies say is probably safe.
Who the hell would take B? Unless we believe that our studies are infallible, all encompassing and perfectly established and executed the first will always be a better option. Time and time again we see that things previously thought safe are not but I would argue it is far far rarer to see that on the more naturally derived side of food.