PK,Well, you are actually eating a very high fat calorie restricted diet:
If your 8.5 lbs. of weight loss was all due to fat loss, then you would be averaging approximately 1 lb. of fat loss per day, or , putting it in other terms, you would be consuming 1 lb. of your own adipose tissue ( autolysis ) to make up for the energy deficit created by restricting caloric intake. This implies creating a daily caloric deficit on the order of 4700 cal. due to 3500 calories from autolysis of one pound of adipose fat and the additional 1200 calories that you are eating. This is a massive energy deficit, and I expect extremely unlikely. Nevertheless, this represents a diet that is roughly 75% fat and 25% carbohydrates, which I would expect to be rather ketogenic.
If we assume that half of your weightloss was due to water ( we would expect that while in ketosis ), your average fat loss per day would be approximately 1800 calories, making your diet 1800 F, 800 CHO, and 200 P, which still has 65% of calories coming from fat. Again, I would expect this to be quite ketogenic.
Glycerol is a great substrate for gluconeogenesis as two glycerol molecules can be used to produce one glucose molecule. Mitochondrial oxidation of non-esterified fatty acids produce ketones, meaning that as your body strips fatty acids from the glycerol backbone, they get oxidized and produce ketone bodies. At the same time, your liver gets a fresh supply of bare glycerol from which to synthesize fresh glucose!
With respect to your question #4, you are probably eating significantly below your maintenance requirements, I think you would need to be at least at 1.5 g/kg of body weight to maintain your muscle mass, and this would depend to a very large extent on your training. Heavier training would imply more muscular trauma, and accordingly, a higher need for protein. Your body needs to get nitrogen from somewhere, and if you don't provide it in the diet, it will be scavenged from other sources.
Thanks for taking the time to put all that together - it was helpful. Question: What am I missing here. How did you come up with 75% fat, 25% carb? Thanks in advance