First: how large is the serving? A small glass of wine in a bar or restaurant is 125ml, medium is 175ml and large is 250ml (one-third of a bottle of wine) – so, more volume equals more calories.

So, just how much are our drinking habits harming our brain? Three 175ml glasses of wine; three pints of 4 per cent beer or seven single shots of spirit As soon as alcohol passes our lips ...