Im sure if you added in 3 of anything with the same calorie content as the beer it would have done the same thing. I don't think its the actual content of the beer, you might as well have added in 3 different 1/4 cups of Oatmeal to get the same 75cals, and you would probably be amazed at the results of that too, maybe even more so. If your diet is really strict the 3 - 64cal beers isn't even 200 calories so I don't think it would have hurt you much.