Re alcohol, it's forbidden in these first two weeks of Bootcamp and then allowed from then on in moderation.
Zoe Harcombe wrote a really good piece about alcohol, which I posted in an earlier thread. As many of you won't have been on that thread, I'll re-post it here. It's important that you all understand the impact of drinking it. It's not about the calories, or even the carbs - it's about the effect that it has on the body, and specifically its ability to burn fat.
The most important thing to mention here is alcohol. Alcohol beautifully undermines the calorie theory. Alcohol – as opposed to any other ingredients included in alcoholic drinks, such as grapes or grains – contains approximately seven calories per gram. The calorie theorists think that alcohol will make you fat from the calories it contains. However, the body cannot store alcohol. There is no mechanism by which alcohol per se is turned to body fat. So how can the calories in alcohol make us fat if they can’t be turned into fat?
The issue with alcohol is in fact not its calorie content, but the fact that alcohol impairs the operation of glucagon (Ref 7). The body registers alcohol as a poison and the liver thus prioritises getting rid of the substance ahead of doing the many other jobs that the liver must do. This means that maintaining blood glucose levels, by accessing glucose or breaking down body fat, becomes less of a priority
If you have alcohol in the evening (which is when we tend to consume it), we inhibit glucagon from working for some hours following. Exactly how many hours will depend on how much you’ve had to drink, how quickly your liver gets rid of alcohol and other individual factors. As a rule of thumb, it takes approximately one hour for the liver to process one unit of alcohol. During the time that the liver is getting rid of the alcohol, you won’t be burning fat. Importantly, you won’t be burning glucose either because i) the body will preferentially burn alcohol instead of glucose and ii) the liver is too busy dealing with the alcohol to bother with glucose or body fat
You may have spotted another issue here. Because the body prioritises getting rid of alcohol above regulating blood glucose levels, alcohol drives the munchies. While the liver is processing the alcohol, it is not topping up blood glucose levels and hence they can fall, which makes you hungry. You know this. You know that the greasy takeaway only ever looks enticing when it’s midnight and you’ve been drinking. In broad daylight, leftovers look distinctly unappetising. This is why some alcoholic drinks are called an aperitif. They are intended to stimulate the appetite before enjoying a good meal
And a bit about glucagon:
The mechanism by which body fat is broken down involves a hormone called glucagon. Think of insulin and glucagon as equal and opposite hormones. Insulin takes glucose out of the blood stream and stores fuel; glucagon puts glucose back into the blood stream and accesses fuel. These two hormones are antagonists. They are not in play at the same time. If insulin is doing something, glucagon is dormant. If glucagon is doing something, insulin is dormant