If your on the 440ml cans then your consuming around 9 units everynight, deemed safe is 4 units for a male (but 6 units is safe, apparently this was going to be the figure but was turned down to 4 as 6 can get many very tipsy! ) As for the 9 units you are under the quota for getting withdrawal symptoms from stopping, 10 - 12 units daily is where it starts to get dodgy and more than that you got serious issues lol.