We’ve all seen our friends and ourselves go off to college and come back with a big gut. Many of them should have gone to the New Jersey Detox alcohol detox centers. So, now that we are older… what is it doing to that “girlish” figure we are trying to keep?? Here is a break down of what alcohol consumption does to your body and your muscle mass.
1- Alcohol really affects the amount of fat your body can and will burn for energy!
In a study done by the American Journal of Clinical Research  they concluded that just a mere 24g of alcohol consumption showed whole-body lipid oxidation ( the rate at which your body burns fat) decreased by a whopping 73%!
When alcohol goes thru the liver, the by-product is called Acetate. It would appear that acetate puts the proverbial brakes on fat burning.
2- Increase in appetite
In another American Journal of Clinical Nutrition study, there was evidence to suggest that consumption of alcohol lead to an increase in appetite over that of any other carbohydrate type drink. 
3- Decrease in Testosterone and an Increase in Cortisol
A study of 8 healthy male volunteers observed that after drinking alcohol, the effects of a significant decrease in testosterone and an increase in cortisol (a muscle destroying hormone) lasted up to 24 hours! 
The only real question to ask yourself is this…
If you are serious about building muscle and burning fat, you want all the free testosterone levels you can get and you want to reduce cortisol in any way you can. That means go lite on the drinking because it does affect your hormones
4- Decrease in vitamin and mineral absorption
When you consume large quantities of alcohol, your liver is busy converting the alcohol to acetate and any vitamins and minerals that it might process are taken up by the detoxification process.
Alcohol interferes with the metabolism of most vitamins, and with the absorption of many nutrients. Alcohol stimulates both urinary calcium and magnesium excretion. 
This just means that you’ll get less of a benefit from the “healthy” meal you may be consuming.
Food in the stomach will compete with ethanol for absorption into the blood stream. It is well known that alcohol competes and influences the processing of nutrients in the body
5-Decrease in protein synthesis of type II fibers
This means the actual building of muscle is slowed down by 20%+ or more. This included a 35% decrease in muscle insulin-like growth factor-I (GF-I). 
A common side effect of alcohol is dehydration. Alcohol is a diuretic. Drinks containing 4% alcohol tend to delay the recovery process. 
Considering how important water is to muscle building and general health, it’s clear that dehydration can put a damper on your progress. After alcohol consumption the first thing you might want to do is drink coffee. But that’s a diuretic as well. How to avoid dehydration? Drink more water.
Alcohol consumption, especially at the times when you would normally sleep, can have effects on the quality of sleep. Clearly high quality sleep is extremely important to the rebuilding and growth process of muscle. Without proper rest and recovery, your gains will be affected.
Alcohol consumption can induce sleep disorders by disrupting the sequence and duration of sleep states and by altering total sleep time as well as the time required to fall asleep. 
8- The next day
A rather obvious conclusion but if you plan on drinking on a Friday night in excess then the leg workout you thought of doing on Saturday morning won’t be top notch. It takes a bit to recover, your body to detoxify and for you mentally to be prepared to workout.
Not to mention you need energy for the workout ahead (source).
You might think twice about having that second drink after reading this article. Keep your drinking to a minimum to keep your shape in check.