Comment by theferalrobot

>derive it from something humans have been eating for hundreds of thousands of years

This one stands out to me because, as they say, “the dose makes the poison”. Taking some trace element from something “natural” and highly concentrating it is basically as novel as something new. Consuming a gram of something over a lifetime is different than consuming a gram of something every day.

Also, eating something for hundreds of thousands of years only means that most people will live several decades while eating it. It doesn’t mean people won’t be killed by it. It doesn’t mean people wont get cancer from it in 30-40 years. Killing 1% of the people that eat something would be a perfectly acceptable evolutionary loss, depending on the amount of nutrition and calories provided.

That’s why it is an appeal to nature fallacy. Because it says absolutely nothing about population level long term health effects.

> The appeal is to have a diet more in line with our evolutionary past.

Okay, where in the evolutionary past did we eat Doritos colored with annatto?

> 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...

A lot of things we have historically eaten are carcinogenic. Natural flavoring for root beer is flavored with sarsaparilla root. Fun fact, it contains safrole, a known carcinogen.

Carrots, bananas, parsley, black pepper, clove, anise contain alkenylbenzene compounds which cause cancer in rodents.

We've historically eaten coumarin-containing plants (tonka beans, cassia) -- carcinogenic.

Furoanocoumarins in parsnips, celery root, grapefruit, etc, can cause skin burns and prevent many drugs from working (or make them work too fast).

Cassava, sorghum, stone fruits, bamboo shoots and almonds contain cyanogenic glycosides which turn into cyanide when eaten.

Undercooked beans contain lectins, and 4-5 kidney beans are enough to cause somachache, vomiting and diarrhea.

Nightshades (tomatoes, potatoes, eggplants) contain solanine which is toxic.

Various fruits like pineapples have raphides which are sharp spikes made of oxalic acid. If you eat particularly aggressive ones they can even cause bleeding.

The pawpaw fruit that has been eaten for generations contains annonacin, a neurotoxin.

People have been eating (prepared) mushrooms like gyromitra that have gyromitrin (metabolized to monomethylhydrazine, rocket fuel, a neurotoxin) for generations too. It can actually cause ALS over time.

Castor beans contain ricin.

The difference is apparently God doesn't have to publish this information on an ingredients list.

> B) derive it from petroleum (as current US yellow food dye is) that a couple studies say is probably safe.

"A couple studies" is wildly disingenuous. A quick search will tell you as much.

> Appeal to nature isn't a fallacy

It most certainly is.

> The appeal is to have a diet more in line with our evolutionary past.

Our evolutionary past is full of death and disease from what we ate. Humans have been drinking alcohol for centuries and there is strong scientific consensus that it causes cancer. Just because it's what humans have been doing doesn't mean it is safe and we should continue it.

> 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.

You say "derive it from petroleum" like they pump it directly from the well into your food. Petroleum is composed of hydrocarbons, it's very useful and is used in a lot of different applications. Just because you don't understand something doesn't mean it is dangerous.