Here's a vague reference to side-effects on ketogenic (ZC) diets(doesn't cover all of them, last I checked):-
http://en.wikipedia.org/wiki/Ketogenic_diet#Adverse_effects
As regards the studies done on the dangers of meats, they are everywhere and easy to find so a simple googling should suffice. Large numbers of studies show that the higher the (cooked) meat-intake is in one's diet the greater is the risk to health.It's generally irrelevant as to the other dietary factors, as, inevitably, the more meat is consumed in the diet, the less people eat of other foods(meat is more satiating, for one thing). To take 1 example, if someone eats 30% of his diet as cooked meat and then increases his meat-intake to 50% of his diet, then, by extension, the foods making up what was 70% of his diet before, now only make up the other 50% of his diet. Simple mathematics.
The ketogenic diet is based on dairies and MCT oil. How do you know that it's the low carbs that caused the adverse effects of this diet, and not these unhealthy fat ?
For instance, hypoglycaemia is probably caused by the small and medium chain triglycerides that are metabolised like sugar.
Dr. Jan Kwasniewski. has very good results with his cooked diet high in fat, moderate in protein and low in carbs. Cooked meat don't seem to be so unhealthy in Poland :
"In practice, the diet has shown to be unbelievably very effective measures to cure many sick people from the diseases considered in contemporary medicine incurable. Dr. Jan Kwasniewski has cured thousands of people suffering from various illnesses as Buerger's disease, arthritis, Gastrointestinal disorder, obesity, diabetes and many others applying his "Optimal Diet" and "Selective Currents" to some of them.
An estimated more then two million people are already on the optimal diet. Most of these people live in Poland, though news of the diet has spread throughout the world. There are many optimal eaters in the USA, Canada, Australia, South Africa, Canary Islands and many various countries in Europe and even in Oman.
There are diseases that the medical establishment is even today enable to cure is diabetes. No diabetic who opted for a method commonly applied in modern medicine can eliminate the disease, but 80% of those who have chosen the optimal diet will overcome their disease and that the remaining 20% are going to be better, though not perfect, health.
In 1999 the Polish Cultural Union in Vienna Austria recommended Dr. Jan Kwasniewski as a candidate to Swedish Nobel Prize in medicine."