Array of party drinks for a christmas party.

The Christmas season usually brings lots of opportunities for eating and drinking – often to excess and although many of us won’t be eating out or able to go to the pub this year, that doesn’t mean that we won’t be celebrating Christmas with drinks and festive food.

Whilst some of the advice applies across the board, for those with diabetes there are some special considerations when we’re drinking alcohol and this article highlights these with tips for managing the alcohol and carbohydrates that some of these contain.

What is alcohol doing to my body?

Anatomical picture of a man to show major body organs including liver.

The most important fact to know in relation to diabetes is that the liver will process alcohol in preference to regulating blood glucose, its usual function. It cannot do both at the same time.

How quickly we absorb alcohol depends on a number of factors, so will affect our levels:

  • The concentration of alcohol in the drink, so look at the % of alcohol and the higher this is the faster it’s likely to be absorbed – potentially putting a strain on the liver;
  • If the drink is fizzy i.e. carbonated, then it will also be absorbed much quicker than non-sparkling drinks;
  • Whether the stomach is actively digesting carbohydrates i.e. food, which will slow down the absorption of alcohol.

TIP #1  Pace your drinking so to slow down the absorption of alcohol into the bloodstream.

Before you start

It’s important to establish your starting point and the Libre sensor makes this so much easier so make sure you scan before you start drinking. If your levels are low you may then need to account for this with eating a meal or snack. Even if calculating carbs for the alcohol, consider delaying the adjustment for this or split the dose over the period of time you’ll be drinking.

TIP #2  Before drinking, scan to check if you’re already at the lower end of your range. Consider eating something.

    Eating to avoid the hypo

    The digestion of food will slow down the rate at which alcohol is absorbed into the blood stream – and don’t forget it will take another 5-10 minutes to reach the interstitial fluid which is what your Libre sensor is reading. Eating will therefore slow down the liver’s processing of alcohol which could help to prevent you from having a hypo or reduce its severity.

    TIP #3  Avoid drinking alcohol on an empty stomach.

    Long lasting effects

    Alcohol has a long-lasting effect on glucose levels and can impact your readings for 12-24 hours after being consumed. 

    It’s always good to have alcohol-free days so that blood glucose has a chance to stabilise, for one reason, but if you are drinking on consecutive days over the Christmas period then be sure to follow to pay more attention to glucose levels at frequent intervals.

    TIP #4  After drinking alcohol, scan more frequently for the next 24 hours and make corrections as appropriate.

    When to scan

    The Libre is even more a key tool to managing glucose levels when drinking. The ability to see your levels at any time should help to make drinking alcohol ‘safer’ for for those with diabetes.

    What’s the limit?

    For type 1s there’s no specific recommendation as to how many units of alcohol are safe to drink. The recommendation in the UK is up to 14 units of alcohol per week and this applies to both male and female drinkers.

    The surprising fact is how much (or little!) is one unit. 

    What to drink

    It follows logic that the sweeter the drink, then generally it will contain more sugar and so is more likely to cause a spike in glucose levels.

    Wine and fizz

    Wines contain a significant amount of sugar although the amount reduces the drier the type. Dry wines such as chardonnay or dry versions of Sauvignon Blanc and Pinot Grigio should have less effect on glucose levels than Riesling wines, sherry or dessert wine.

    Dry wine, brut champagne or Prosecco will usually have around 1-2g of carbohydrates per medium-sized glass. A medium wine will have 5-10g of carbohydrates and a sweet wine generally has more than 10g of carbohydrates.

    Port and Sherry are fortified wines which are sweet and heavy, often containing over 20g of carbohydrates per small glass. 


    Beers typically contain around 10-15g of carbohydrates per pint and 'light' beers will have less.

    Stout and Guinness are heavier in terms of carbohydrate content and you should account for at least 20g per pint.

    Real ales and pale ales usually have between 10-20g per pint, although these vary considerably and may contain more sugar if sweet flavourings are used.


    Distilled spirits such as vodka, gin, rum or whiskey generally do not contain sugar so alone will not raise glucose levels, however, as these are often drunk with mixers, you need to consider the overall drink content and calculate the carbohydrates based on this. It's important to ensure that if asking for a 'diet' mixer that this is the one provided with the drink. 


    Liqueurs can contain as much as 10-20g of carbohydrates per shot but vary considerably and you should check the content before drinking these so ensure you can make suitable adjustments to your regimen,

    Drinking buddies

    Two ladies in christmas leggings with a bottle of champagne and 2 glasses raised.

    Ensure that you tell your family or friends that you'll be drinking and how they can help you if needed. Remember that a hypo can be confused with being drunk!

    TIP #5 When going out drinking, keep your medical details and diabetes kit handy in case of emergency and ensure someone knows how to handle such a situation. 

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