What Made Him Like That

I have no idea hubby should take testosterone supplements or weight lose supplements actually. He does not look fat. His weight is ok but his tummy is too big. I wonder what make him has a big tummy as he is not a heavy beer drinker. In fact, he could not drink at all! 1 Bottle of 500ml beer already made him looks like a red apple. His daily intake already quite normal, so I really lost of idea what made his tummy big.