Despite the fact that beer has been around far longer than any recognisable form of medical science, no one has yet been able to prove once and for all what the exact effects of drinking beer are on the human body.
Part of the problem is that there are thousands of variations of beer, and each one is a complex drink with different properties. Heavy consumption of beer is as bad for you as heavy consumption of any alcoholic drink, however there are some benefits to drinking beer.
It is widely accepted that drunk in moderation beer has positive effects, Beer contains no fat, and if brewed properly no sugar. It is high in vitamin B12 (Iron), and other minerals. Alcohol is thought to have positive effects in terms of reducing the chances of cancers developing, although much more research is required in this area.
Excessive consumption of beer is proven to be damaging, although it is difficult to prove at what level this begins. The Department of health, which provides advice in the UK suggests 3-4 units or alcohol per day for men and 2-3 units for women (A pint of weak beer is 2 units, strong beer about 3 units) although this is probably very much on the safe side.
Excessive consumption of beer, or any other alcoholic drink may cause the following problems. Damage to, and failure of, the liver due to cirrhosis, reduction in the number of active brain cells, lowering of the sperm count in men, stomach and related ulcers. In addition to these, as beer tends to be drunk in large quantities and beer is between 200-300 calories per pint, it is easy for excessive consumption to cause weight problems.