There’s nothing quite like a rough night out to leave you swearing off alcohol forever. From feelings of nausea to the dreaded alcohol poo, the symptoms of a hangover can be a tough pill to swallow.

But for people with alcohol intolerance, a night of drinking can lead to some even more uncomfortable symptoms on top of the standard fare. Not to be confused with alcohol allergy – a rare but potentially life-threatening condition if left untreated – alcohol intolerance can range in severity from person to person, depending on a range of different factors.

And those factors aren’t just to do with the amount and types of alcohol you drink, either. Your genetic make-up and hormonal state can also impact your body’s ability to process and tolerate alcohol.

Can your genes and hormones influence your tolerance to alcohol?