Huh? I've been a vegetarian for 16 years, and a vegan for one year, and I'm quite adjusted. I don't remember any generations passing in that time, but I might not have been paying attention.

I meant adjusting naturally to the different source of nutrition. If you're a vegan, you would normally need to be very careful of your diet so that you do not introduce nutritional deficiencies into your system, or you would need to subsidize your nutrition with vitamins. Long term, the body could find a way to bypass the nutritional subsidies --it could take a very long time (cows had to develop additional stomachs to adjust to eating primarily grass, for example).

Ahhh... you have to be pretty careful with what you eat if you eat meat as well to. Just walk down the street for examples. Generally, the length of our digestive system is sited as one of the main reasons we are so poorly adapted at eating meat.

Our ancestors generally weren't eating massive portions of heavily processed, heavily spiced meat. Taco Bell gives you the shits because it's Taco Bell, not because it's meat.

In fact, many of our ancestors were often eating so little meat as to be nutritionally insignificant, which is the other major hole in the "eating meat is natural" argument.

But I really don't know why you added "heavily spiced" in there. Spices are usually more or less nutritionally neutral.

> Spices are usually more or less nutritionally neutral.

Nutritionally neutral, but not gastrointestinally, as folks sensitive to spicy food can attest.

It's not really any more difficult to keep your nutrition balanced as a vegan than as a carnivore. Either way, you have to pay a bit of attention to what you eat, not eat too much of this, and not eat too little of that.

And what's wrong with taking supplements? You keep invoking the concept of "natural", but there is nothing intrinsically superior about nature. Humans are in control now, and we're doing a lot better for ourselves than nature ever did.