Well, results will certainly slow down, but that's a choice you're going to have to live with.
Alcohol is empty calories. It doesn't have any nutrients, but does have a caloric value of 7 calories per gram. In just one shot (1.5oz) of 80 proof vodka there's nearly 100 calories. For those of you trying to lose fat, forget it if you are drinking. Not only will the high calorie content of alcohol have a negative effect on your total calorie intake, but it also slows down your metabolism by disrupting the Kreb's cycle. Since the Kreb's cycle isn't working correctly, fats cannot be broken down. In short, your body is trying so hard to digest and metabolize the alcohol, that fat burning stops all together.
Alcohol consumption also hurts muscle growth. Not only due to hangovers lowering your workout intensity, but it actually lowers protein synthesis by 20%. Twenty percent! There are several reasons why it does this. For one, it dehydrates your muscle cells. As many know, hydrated and even over hydrated muscles (like when you take creatine) allows for a much higher anabolic environment. Because your cells aren't holding as much water, it becomes much harder to build muscle. The second reason why alcohol can severely hurt muscle growth is because it blocks the absorption of many important nutrients that are key to muscle contraction, relaxation and growth including calcium, phosphorus, magnesium, iron and potassium.
OK, so I above I lied, there's actually a third way that alcohol slows down protein synthesis, I just wanted to dedicate a big part of this article to it. For those of you that don't already know this, ALCOHOL LOWERS TESTOSTERONE AND INCREASES ESTROGEN! Yes, you read that right. In one particular study, men's testosterone levels were measured before and after consumption of alcohol. At the most intoxicated state, testosterone levels had dropped to an average of 25% lower. It was also interesting to note, that when blood alcohol levels were the highest, testosterone was at its lowest. Alcohol has also been shown to cause a quicker aromatization of androgens into estrogens, which would explain why heavy drinkers often get gynecomastria (bitch tits) over a period of time. For those of you taking andro (and I'm sure you already know my views on andro) I would absolutely avoid alcohol since you already are in risk for gynecomastria with the high androgen levels in your blood. By drinking, you are further putting yourself in risk for aromatization. We should also note, that in a study done with rats, alcohol reduced Insulin like Growth Hormone-1 (IGF-1) by up to 42%. That's a huge drop in IGF-1.
So you said you're taking alot of supplements. If you're taking creatine, the alcohol will make every scoop redundant. If it's 2-3 beers, I don't think it matters.
This is how I think of it. Right after weightlifting on, your muscles need to be fed. You eat your protein, creatine, baked potato, whatever. Later on your muscles still need to be fed. Feeding them with beer....I don't think they'll like that.
