Alcohol and weight loss: Why alcohol might be hindering your weight loss goals

Does alcohol affect weight loss?

If you’re doing everything right—tracking your calories, moving your body, eating well—but the scales still won’t budge, it might be time to look at one stubborn culprit: alcohol.

Even if you don’t see yourself as “a big drinker”, those glasses of wine, beers, or cocktails can quietly add hundreds of extra calories a week, stall fat loss, and drain the energy you need to train, cook, and stay consistent.

Let’s break down how alcohol impacts weight loss, and what happens when you take a break from booze.

Alcohol & weight loss: fast facts

• Pure alcohol contains around 7 calories per gram – almost as much as fat (9 kcal/g).

• These are “empty calories” – they give you energy but zero protein, fibre, vitamins or minerals.

• Your body prioritises metabolising alcohol over carbs, fats, and protein, because alcohol is treated as a toxin. While your system is busy dealing with booze, you’re less efficient at using or storing nutrients from food.

• Both excessive drinking and excess body weight are risk factors for conditions like high blood pressure, certain cancers, heart disease and more – so tackling both together is a powerful move for your long-term health.

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How weight loss actually works

At its simplest, weight loss comes down to energy balance:

Calories in vs. calories out.

To lose body fat, you generally need to be in a calorie deficit over time – burning more energy than you consume.

You can:

• Reduce calorie intake (diet changes),

• Increase calorie output (activity and training),

• Or ideally, a combination of both.

Alcohol complicates this equation more than most people realise.

Why alcohol makes weight loss harder

Having a drink doesn’t automatically mean weight gain, but it does make fat loss more difficult for several reasons.

1. Hidden calories that don’t fill you up

Alcohol is calorie-dense and not satisfying. A few examples:

• A large glass of wine

• A pint of beer

• A couple of cocktails

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You can easily add hundreds of calories in one evening, on top of your meals and snacks – with nothing in return nutritionally, and no real impact on fullness.

Research suggests alcohol can account for up to 10% of the total calorie intake of the average adult drinker in the UK, and around 16% in the USA. For many men, this figure is even higher.

So you might be:

• Eating a balanced diet

• Exercising regularly

…but then unknowingly adding 10–16% extra calories through alcohol alone. That’s enough to completely wipe out your deficit.

2. Mixers, cocktails and “extras”

It’s not just the alcohol itself:

• Sugary mixers (tonic, cola, juices)

• Creamy or syrup-based cocktails

• Heavy, high-carb beers

All of these stack even more calories on top of the alcohol itself. One night out can easily equal the calorie content of an entire extra day of food.

3. Food choices during and after drinking

Alcohol lowers inhibitions and weakens decision-making. That’s when “I’ll just have a snack” turns into:

• Late-night fast food

• Extra desserts

• Grazing without thinking

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Then comes the hangover day:

• Comfort food

• Greasy, high-calorie meals

• “I’ll get back on track tomorrow” thinking

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So it’s not just what you drink—it’s what you eat because you drank.

4. Less energy for movement & training

When you’re tired, nauseous, or foggy from the night before, you’re far less likely to:

• Go to the gym

• Hit your steps

• Cook a decent meal

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Fewer workouts + more time on the sofa + higher calorie intake = one very unhappy fat-loss equation.

5. Nutrient absorption takes a hit

While your body is busy dealing with alcohol:

• Absorption and utilisation of vitamins and minerals (like folate) can be impaired.

• Recovery from training becomes less efficient.

• Your body has less capacity to do the “repair” work that helps you feel and perform at your best.

Alcohol doesn’t satisfy true hunger, so you’ll likely still want to eat, even though you’ve already taken on a big chunk of extra calories.

Can going alcohol-free help you lose weight?

Short answer: Yes, absolutely—if you don’t just swap booze for other high-calorie options.

Removing alcohol:

• Instantly cuts those empty calories.

• Makes it easier to stay in a consistent calorie deficit.

• Often improves sleep, mood and energy – making it easier to train and make better food choices.

Real-life examples from OYNB members

Meagan – goal weight after 15 years

Meagan had been stuck at the same weight for years, despite training hard. When she looked honestly at her beer intake, she realised it might be the missing piece. After taking on the OYNB challenge:

“Day 72 I hit my goal weight. In just over two months, I did what I could not fathom over the past 15 years. I’ve lost over 20 pounds and 4% body fat so far—and I believe I’ll lose another 10 pounds before the year is complete.”

Nathan – down 5 stone and running ultra-marathons

Nathan noticed that his weekend drinking was wrecking his healthy intentions. Once he stopped drinking:

“Every area of my life has improved since I stopped drinking.I am more present with my children, and my mental clarity is off the scale.I’ve lost a total of 5 stone, gone from no running to a 50-mile ultra-marathon, and I’m on track to complete 1000 miles.”

Amanda – 17 pounds down in one month

For Amanda, ditching alcohol gave her the energy and motivation to re-engage with movement and nutrition:

“I never thought I would be here, but I’m past my 90 days with not one drop of alcohol and continuing on to the BIG 365!I’ve been going to the gym, eating healthy, and I’ve lost 17 pounds in the last month. I’ve even signed up for a 5K cancer run this summer!”

Tips to cut alcohol and support weight loss

If you suspect alcohol is stalling your progress, here are some practical steps:

1. Reduce as much as possible

Aim to stay within or below your country’s recommended guidelines, and build in several alcohol-free days each week at a minimum.

2. Choose lower-calorie options

If you do drink:

• Avoid sugary mixers and creamy cocktails.

• Favour spirits with soda water, or lower-calorie options.

• Skip “rounds” culture and order at your own pace.

3. Explore alcohol-free alternatives

The AF market has exploded. Try:

• Alcohol-free beers

• Alcohol-free wines and sparkling options

• Adult soft drinks and sodas

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Many of these are far lower in calories and don’t lead to hangovers, late-night binges, or next-day “ruined” workouts.

4. Plan your food on “trigger” days

If Friday or Saturday is your danger zone:

• Pre-plan your meals.

• Have satisfying, higher-protein options ready.

• Decide in advance how you’ll handle social situations.

5. Take an alcohol-free challenge

The most powerful change isn’t just “drinking less”—it’s changing how you think about alcohol altogether. That’s exactly what an OYNB alcohol-free challenge is designed to do.

How OYNB can help you remove the barrier

If alcohol feels like the invisible wall between you and your weight-loss or health goals, you don’t have to figure it out alone.

Our challenges combine:

• A proven, step-by-step behaviour change programme

• Daily mindset content based on the latest science

• Practical tools for managing triggers and cravings

• A global community of people on the same journey

Taking a break from alcohol is often the first domino that knocks down:

• Late-night snacking

• Missed workouts

• Low energy

• “I’ll start again Monday” cycles

…and replaces them with better sleep, more energy, clearer thinking, and the consistency you need to lose weight and actually keep it off.

Ready to stop alcohol getting in the way of your progress?

If you’re tired of doing the work but not seeing the results, it might be time to remove the alcohol-shaped barrier between you and your goals.

Join an alcohol-free challenge, reset your relationship with drinking, and give your body—and your progress—the clear run it deserves.