Alcohol and Weight Loss: What You Need to Know
Most of us know the classic weight loss advice: eat fewer calories than you burn.
But here is the part many people overlook. Not all calories behave the same in your body. For instance, 300 calories you get from broccoli will affect your body differently than 300 calories you get from cake. But what about 300 calories from your favourite beer, wine, or cocktail?
Alcohol has its own unique effects. Some of these can quietly sabotage your weight, your energy, your sleep, and even your motivation to exercise. If you have been eating well and staying active but still feel stuck, it may be time to look at what is in your glass.
Why Alcohol Makes Weight Loss More Difficult
Alcohol is not just “empty calories”. It affects your body in several ways that make fat loss more difficult, even if you drink moderately.
1. Your body burns alcohol first, and stores the rest
Your liver prioritises breaking down alcohol before anything else.
This slows down fat burning and makes sugar processing less efficient.
Dr Joshua Scott – a primary care sports medicine physician – explains that alcohol has a higher calorie density than most foods, and it also reduces your ability to burn calories effectively.
2. It interferes with nutrient absorption
Alcohol reduces how well your body absorbs vitamins and minerals. These nutrients support metabolism, energy, and recovery, so poor absorption can affect your progress.
3. It affects your muscles
Alcohol inhibits calcium absorption in muscle cells. This can lead to cramping and weaker performance during workouts.
4. It dehydrates you
Alcohol is a diuretic. Dehydration affects digestion, energy levels, skin, and even your appetite signals.
5. It lowers inhibitions around food
A drink or two can make it much harder to stick to your normal eating habits.
This is why late night snacking or fast food often follows a night out.
6. It disrupts your sleep
Many people use alcohol to fall asleep, but it reduces the amount of deep, restorative sleep you get.
It also disrupts REM cycles and can worsen breathing patterns.
Poor sleep leads to lower energy, stronger cravings, reduced motivation to exercise, and a slower metabolism. This creates a cycle that can keep you from reaching your goals.
What Counts as Moderate Drinking
Most guidelines define moderate drinking as:
- Women: up to one drink per day
- Men: up to two drinks per day
A standard drink is:
- 355 ml beer
- 147 ml wine
- 44 ml spirits
Restaurant servings are often larger, so it is easy to drink more than you realise.
Low Calorie Alcohol Options
If you choose to drink, these options are lighter on calories and commonly available in South Africa:
- Light beer: about 100 calories per 355 ml
- Gin with sugar free tonic: about 110 calories
- Red or white wine: about 120 to 125 calories per 147 ml
- Whiskey with soda or on ice: about 105 calories
High Calorie Drinks to Limit
These drinks can push your calorie intake up very quickly:
- Margarita: about 220 to 230 calories
- Piña colada: about 440 calories
- Long Island iced tea: about 250 to 260 calories
- Craft beer: 150 to 400 calories depending on alcohol content
Do You Need to Quit Alcohol to Lose Weight
Not necessarily.
Most experts agree that you do not need to stop drinking completely to see results.
However, if your weight loss has stalled, or you are struggling with low energy, cravings, or poor sleep, it may be worth trying a dry week or a dry month. Many people notice better sleep, fewer cravings, more stable energy, improved workouts, and renewed weight loss.
When you start drinking again, pay attention to how it affects your body, your mood, and your habits.
The Bottom Line
Alcohol can fit into a healthy lifestyle, but it is not neutral.
It affects your metabolism, sleep, appetite, and energy in ways that can slow your progress.
By choosing smarter drinks, drinking mindfully, and understanding how alcohol interacts with your body, you can enjoy a drink without derailing your goals.
Small changes can make a big difference.
Only 2 Rooms Left On My France Countryside Walk
Spend a week with me wandering through the beautiful villages, enjoy long French lunches and dinners together, and stay in a fairytale chateau in the Loir Valley.
21 – 27 June is fully booked, but 5 – 11 July 2026 still has two beautiful rooms open. (2 couples or 2 singles)
It’s the kind of week that fills your soul.
