Hi Alison
OK, they metabolize in the same way and have the same effect on the liver. But a shot of alcohol comprises 120 calories (480kJ) whereas the daily average calorie intake in Australia is 3150 calories.
Which I guess is why the boffins recommend limiting your intake to 2 standard drinks a day. And if your kid consumed the same amount of beer per day as he does coke he would have serious alcohol related effects.
The point about alcohol being more or less harmless in relation to obesity is that it contains very little sugar. As David points out alcohol has it's own problems if consumed in excess. But "normal" consumption will not make you fat. David deals with this on p69 of Sweet Poison Quit Plan where he suggests that it is actually beneficial in reducing the effects of the fructose we ingest. Apart from the metabolism alcohol has other different effects on the body; like crossing the brain blood barrier.
The book is also called The Real Truth About Sugar. I bought my copy on Amazon. The author is Samantha Quinn. You can also buy it from the web site but it just links you back to Amazon. I don't recall buying the e-book but having bought the paperback, I can access the eBook by downloading the Kindle Reader, both for my PC and to my tablet. Ain't this fun :-)
So "eat drink and be merry" :-))
JohnN