So caffeine and the stimulant in chocolate raises insulin. Insulin shuts down fat oxidation. So, if you are in ketosis, on VLC, won't drinking coffee or eating raw dark chocolate shut of that nice fat burning mode? I know when I am VLC, if I have ANY, I mean a few SIPS of tea or nibbles of cacao, I IMMEDIATELY get that "hormonally hungry" feeling.
So I've found that on meat/fat only days, in Ketosis, caffeine or stimulants of any kind make me feel terrible, and VERY hormonally hungry between meals (with the same timing and calories that on non-caffeine days are satiating). I literally can scarcely make it to my next meal, feeling utterly starved and losing all concentration.
However, on carb-up days after exercise, I can eat some chocolate or drink some tea, and while I feel quite stimulated (perhaps too much, I seem to be sensitive), it isn't a bad feeling, and I don't get the hunger afterwards.
Insulin does not just throw a kill switch on fat oxidation. The levels of numerous hormones affect the rate of fatty acid oxidation at any given time. Epinephrine, which stimulants like caffeine raises, increases fatty acid oxidation. I couldn't say for sure right now, but I have read that caffeine and theobromine tend to increase fatty acid oxidation.
As far as your hunger, if such foods do raise insulin (I was unaware they did), that might cause low blood sugar, which can result in hunger. But I'm only speculating, it could be other things.
Caffeine does raise insulin, but it also causes insulin resistance- if it didn't, it wouldn't have the effect that it does of forcing energy (fat and glucose) into the bloodstream.
I think the most likely cause of your immediate hunger is the effect of either the caffeine or the tannins on your gut, which would stimulate appetite (stimulating gastric acid, speeding gastric emptying etc.).
Chocolates primary stimulants are theobromine, and phenethylamine, although theobromine is a xanthine family compound like caffiene, and there is a tiny amount of caffiene in chocolate. Personally chocamine or chocolate extracts stimulant action kicks caffienes or coffees behind, being both stronger and unlike caffiene, slightly mood boosting.
It seems little known to many people however, chocolate (or rather raw unprocessed cacao) is quite full of carbs apparently.
I cant remember if they are fibre or sugar or what though. I only know because its considered a forbidden food on the SCD diet because of its carb content (dark or not), and I spent a while trying to find what kind it was, but ive forgotten what I found.
That said, rabid knee shaking fear of a macronutrient probably isnt healthy. Besides you could always switch to chocamine, which has no sugar or carbs (but it is pretty strong tho, as mentioned, stronger than coffee or energy drinks, although nothing druglike)
I lost a good bit of weight while drinking my usual 6 cups a day. I also toss a heaping teaspoon of navitas cocao powder into my whey shakes a couple of times a day. None of this knocked me out of ketosis.
Sure there's no sugar in that dark chocolate?
Black, plain coffee won't raise your insulin in any meaningful way.
What shuts down any and all fat-burning is eating enough calories to support your energy needs (read: maintenance) and/or eating more than those amount of calories.
You will burn bodyfat while in some sort of caloric deficit. If you are in caloric deficit you won't have to worry about insulin.
? Have you had tests done to determine whether your insulin level rises in response to tea-sipping? It's not all that clear that caffeine raises insulin levels.
Granted these studies were not done on VLC dieters. In your VLC-state of ketosis maybe it is possible that stimulants like caffeine have that effect. Show us the numbers!
Oh lordy. Fat burning vs. carb burning is irrelevant. If you have a lower RQ (burn more fat vs. carb) or a higher one, it doesn't matter. It's like if you have a mixed fuel furnace. You put oil and coal in it. The furnace burns more oil than coal when that tank is more full, but it's still heating the same home. Is the furnace running on 70% oil more of a "fat burning" furnace than one running on 70% coal.
I don't think so.
Nutritional ketosis and being a fat burning beast are gimmicks people.
Insulin is not the only way to stop/start fat storage/burning: http://weightology.net/weightologyweekly/?page_id=319
Caffeine potentially decreases insulin sensitivity: http://examine.com/supplements/Caffeine/#xmain_clinical_results