UK daily guidelines for drinking are measured in units. The amount of units in a drink varies depending on its strength and the size of the glass. The recommended units for women are no more than 2-3 units a day and for men no more than 3-4 units a day. It is also recommended to have at least 2 days a week where you don’t drink.
Guidelines are different for men and women as women are generally smaller than men and have less body water; also they have less of the enzyme which breaks down alcohol. However, whether male or female the way alcohol affects you will depend on your age, size, health, how quickly you drink, how much you have eaten and your stress levels.
Labels on bottles of alcoholic drinks usually contain information to help you work out units. They tell you the total number of units contained in a bottle or the number of units in a specific standard measure, as well as alcoholic strength.