Rob - the idea of Paleo is more to eat the food of ancestors and one thing that keeps coming up frequently is that it is perceived as a high protein diet...it is not. The ancestors didn't have an abundance of protein every day...only when they made a good kill and that would last for a while.
With modern day adaptation to Paleo eating, we should have ample protein but not overdo it and the key to avoiding keytones is to eat plenty of non-starchy carbs in the form of allowed vegetables and fruits.
William will probably correct me for this loose interpretation of Paleo eating.
The nutritionally oriented physicians today steering patients toward Paleo type eating emphasize that protein is eaten in moderation... relatively small portions... about the size of a deck of cards... and often for 3 meals a day ... yielding approximately 20 grams of protein for each deck of card/serving or a total of around 60 grams a day. Heavy exercisers require more. The focus though is getting in the minimum of 9 or 10 servings of nonstarchy carbs and fruit, eliminating all grains, dairy, beans (like dried beans) but not to have too much in the way of fruit that is very sweet - like bananas, pineapple, dried fruit that will produce a blood sugar rush and subsequent insulin spike and then a hypoglycemic event as a result.
This is a very rough outline. You can check the Paleo website for more tips.
My functional medicine MD follows the Schwarzbein Principle of eating which is almost Paleo...but allows small amounts of brown rice and oatmeal because Dr. Schwarzbein feels people who have burned out adrenals cannot function and heal without just a bit of added carbs - thus the brown rice and oatmeal, but these are small amounts and not at every meal... maybe only one a day and maybe not every day. She's an endocrinologist who was seriously ill from adrenal burnout and she's developed a recovery protocol. You have to restore adrenal function before anything else.... thus her eating plan.
When you eat more foods than protein, you will not develop ketones. That's the old Atkins style diet where little in the way of veggies was allowed...it was something like less than 20 grams total a day from veggies or fruit..which is virtually nothing... and was hard on the kidneys if one stayed on that plan for an extended period of time. Later on, Atkins expanded his plan to include more balanced eating rather than so heavily weighted toward major protein intake- fatty protein especially.
Forgive me William for the loose interpretation of Paleo.
Jackie