I think what Kiwi MEANS to say is that, whilst it's perfectly natural and possible to fast for extended periods of time, what is OPTIMAL depends on individual circumstances.
Originally Posted by whitebear
An analogy: Masai, Jain and Inuit diets are all naturally occurring tribal diets which humans can follow long-term. All can sustain the human body and none, when done correctly, will impair your ability to live a full, natural life, have many kids and be healthy. However, depending on the person's genes, the food available and the type of exercise they do, one of those diets will be OPTIMAL. Likewise, whilst some human tribes don't fast at all, some fast frequently for short periods and some go for a week or more without more than a few nuts and leaves, what is optimal depends on the individual's situation.
So, yes, Kiwi and I COULD fast for a week or more with no ill-effect, but, from the sound of it, it isn't optimal for either of us.
I rarely talk to people about Paleo/Primal, but, when I do, it's when they're NOT complaining about their weight or health.
You see, I don't really "do" pity. And one thing I've learned about people is that they're more open to suggestion when they're happy and stable. When they complain they only ever want pity, not to be advised.