I did strict - STRICT - paleo for 5 months. Started by quitting sugar cold turkey (no ketchup, no dressings, not even iodized salt). I felt no different in terms of mood. I may have had withdrawal, but I don't remember.
I stopped doing paleo because I'm approaching the process a lot differently - no diet plan, just intuitive/normal eating. I generally choose not to eat grains as they cause me digestive problems as does dairy, although I still eat both from time to time. I have celiac disease, so absolutely no wheat.
However, I don't limit sugar consumption anymore. I don't see the point if my mood doesn't change and my weight seems unaffected. My "diet" is mostly
paleo, minus the attachment to perfection. It just is what it is. Because I don't eat many grains, it's a natural consequence that I don't eat much sugar (since it's loaded into so many cakes, brownies, cereals, etc). I have been on this same plan for about 10 months.
However, as the pounds come off, I get this tension in my throat which is asking for a candy bar - a full-on Snickers attack. I could be a commercial. Meditate all I want, that sensation is there. Could this be sugar withdrawal even though I haven't strictly gone off sugar? (Or maybe I'm not eating it and I just don't realize it).