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Home/Guides & Tips/Weight Loss/

Why am I not losing weight

Why am I not losing weight? Possible reasons

Feel like you’re doing everything right but you’re just not losing weight? Here’s what could be going on.

clinician image

Medically reviewed by

Dr Earim Chaudry (MBBS), Chief Medical Officer

iconUpdated 9th January 2025
Table of contents
  • Why am I not losing weight in ...
  • Why am I not losing weight whe...
  • Weight loss and alcohol
  • Weight loss and health conditi...
  • Medications that cause weight ...
  • Sleep and weight loss
  • Other reasons you can’t lose w...
  • Could weight loss medications ...

Picture this: you’ve cut out takeaways and have been eating well for months. You’ve even started swimming three times per week. You feel great—yet the numbers on the scale haven’t moved.

It’s something we hear all the time at Voy: I’m making all these positive changes, so why aren’t I losing weight?

There’s a few possible explanations here, and understanding them can help you decide how to move forward. We’ve broken them down for you below.

But before we get into it, we just want to say: every weight loss journey has its ups and downs, and progress plateaus are common. You might be Googling " How much weight can I lose in a month ?", but it’s a marathon not a sprint. We know that it’s super demoralising not to see your efforts pay off, but it doesn't mean that you won’t reach your health goals. Keep at it—we know you’ll get there.

An illustration of a balancing scale with one side holding a weight and the other side holding a confused person, symbolizing the challenges and confusion around achieving weight loss balance.

Why am I not losing weight in a calorie deficit?

It’s true that to lose weight, you need to burn more calories than you consume. Yet it’s not as straightforward as weight loss equals calories in minus calories out.

Your body is very intelligent and adaptable to change. When you’re in a prolonged calorie deficit, your body reduces the rate at which you burn energy making it harder to lose weight. This can result in a weight loss plateau.

It happens because your body can see calorie restriction as cause for alarm (read: that you’re in danger of starving). So, it kicks into survival mode to conserve energy and keep you from losing more. Another thing that might happen is an increase of gut hormones that drive appetite, to try and get you to regain that weight.

As part of our weight loss programme, our coaches will help you find a nutritious eating plan that works for you.

For more about metabolism and how it changes throughout your life, check out our article on metabolic age—it’s part of an emerging theory surrounding metabolism, and how quickly your body burns calories.

Why am I not losing weight when I exercise?

Exercise is a super important part of a healthy lifestyle. Though research shows that on its own, it doesn’t always lead to weight loss.

Yes, moving your body means that you’re using more energy—but people do tend to compensate for that by eating more to meet those needs.

Plus, we don’t actually burn a huge amount of calories from exercise itself. For example, someone with a lower level of fitness who was exercising intensely for an hour might burn 250 calories—which you could eat in a matter of minutes.

That doesn’t mean you should skip your workouts, though! Exercise keeps you strong and healthy: it reduces your risk of illness, improves sleep and mental health, and more. And it plays a role in weight loss by improving your metabolic health: for example, by building muscle and increasing the amount of energy your body uses at rest.

Try to do at least 150 minutes of moderate-intensity movement (like hiking or cycling) plus two strength sessions per week.

Curious about weight loss medications?
They can be a gamechanger when exercise and diet aren’t giving you the results you’d hoped for. Voy’s weight loss programme combines science-backed medicines with a team of health experts cheering you on. Find out if it’s right for you today.
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Weight loss and alcohol

Raising a glass now and again probably won’t have much of an impact on your weight. But because alcoholic drinks tend to be high in calories, enjoying them more regularly might. Moderate drinking also tends to enhance appetite —which could lead you to eat more.

It can have knock-on effects for your metabolism, too. Alcohol can not only disrupt your body’s process of burning fat but also lead fat to build up around your middle.

Finally, having a few drinks can mess with your sleep, which also influences weight loss (more on that below).

Weight loss and health conditions

Some health issues can cause weight gain—and make extra pounds harder to lose.

Hypothyroidism

Also known as an underactive thyroid, a gland whose job is to produce hormones that control your metabolism. When your thyroid doesn’t produce enough of said hormones, it can disrupt important processes like fat burning and the rate at which your body uses energy. Ultimately, this can lead to weight gain.

You can check your thyroid health with a blood test from Voy.

Polycystic ovary syndrome (PCOS)

There are three main features of PCOS. It can cause irregular periods and excess levels of too many “male” hormones, aka androgens. High androgen levels can contribute to weight gain around the middle. With PCOS, your ovaries may also become enlarged and contain many follicles (fluid-filled sacs) that surround the eggs.

But it’s estimated that most people with PCOS also have insulin resistance, where the body becomes less sensitive to the effects of insulin. This means that less sugar can be absorbed from the blood and used as energy— and the excess sugar can then be stored as fat.

Insulin resistance and diabetes

Insulin resistance is also linked to diabetes (it’s usually associated with type 2) and can be a condition on its own. It contributes to weight gain in the way we explained above.

Medications that cause weight gain

And then there are certain medications that can bring on weight gain as a side effect. Some antipsychotics, antidepressants, and blood pressure medicines fall into this category.

In some cases, there might be an alternative treatment you can try. Check in with your provider for advice.

Sleep and weight loss

Did you know that how well you sleep can affect your weight, too? Yep—when you’re deprived of sleep, it affects hormones which control your appetite.

The result is that you’re more likely to crave high-calorie options and eat more, possibly to try and ease your fatigue. Plus, when you’re tired, it’s harder to exercise self-control. That means you’re more likely to cave in to those impulses.

Poor sleep is also linked to a reduced metabolic rate, which means that you’re burning fewer calories—so, it’s harder for you to lose weight.

Looking to start your weight loss journey?
Take a quick eligibility quiz to explore your options and see how we can support you.

Looking to maximize your weight loss results? Don't miss our must-read blog: How Much Weight Can I Lose in a Month?!

Other reasons you can’t lose weight

You’re stressed

You’ve probably heard of cortisol, the hormone that’s released when you’re stressed. When its levels are high, this can promote the build-up of fat around your middle and bring on cravings for comfort foods—i.e. those high in fat and sugar. Stress can also impact your weight , influencing both weight gain and loss depending on how your body responds.

You aren’t staying consistent

Losing weight is a long game. To see results, you have to repeat the same healthy behaviours, again and again. And if your motivation dips for whatever reason, you might stray from your path.

Try to come up with a plan that’s realistic and gels with your schedule, keeping in mind that a safe and sustainable weight loss is around 4-8 pounds in a month. Hold yourself accountable for keeping it up, stay consistent, and trust the process—we know that you can do it

Could weight loss medications help?

If anything we’ve just said struck a chord with you, we get it—losing weight can be super tough, especially when you’re trying your best but aren’t getting results.

Weight loss medications can be a good option here if a healthcare provider says they are suitable for you, especially as obesity rates climb in the UK and traditional methods fall short for many.

These medications work by making you feel full, so you eat less. But they’re not a quick fix. You’ll still need to address the lifestyle factors we mentioned above. When taken alongside changes to your diet and regular exercise, some people report losing up to 25% of their starting weight.

You’ll get weekly medication, like Mounjaro or Wegovy, plus support from our coaches and access to an app to follow your progress, as part of our weight loss programme. And we’ll be right here with you the whole time, cheering you on! Find out if you’re eligible by filling out this short form. We’ll let you know within minutes.

DisclaimerAt Voy, we ensure that everything you read in our blog is medically reviewed and approved. However, the information provided is not meant to replace professional medical advice, diagnosis, or treatment. It should not be relied upon for specific medical advice.
References
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Benton, David, and Hayley A. Young. “Reducing Calorie Intake May Not Help You Lose Body Weight.” Perspectives on Psychological Sciencescribble-underline, vol. 12, no. 5, 2017. journals.sagepub.com/doi/10.1177/1745691617690878.

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Caudwell, Phillipa, et al. “Exercise Alone Is Not Enough: Weight Loss Also Needs a Healthy (Mediterranean) Diet?” Public Health Nutritionscribble-underline, vol. 12, special issue 9A, 2009. www.cambridge.org/core/journals/public-health-nutrition/article/exercise-alone-is-not-enough-weight-loss-also-needs-a-healthy-mediterranean-diet.

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Dumesic, Daniel A., et al. “Hyperandrogenism Accompanies Increased Intra-Abdominal Fat Storage in Normal Weight Polycystic Ovary Syndrome Women.” The Journal of Clinical Endocrinology and Metabolismscribble-underline, vol. 101, no. 11, 2016, pp. 4178–88. pmc.ncbi.nlm.nih.gov/articles/PMC5095243/.

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Greer, Stephanie M., et al. “The Impact of Sleep Deprivation on Food Desire in the Human Brain.” Nature Communicationsscribble-underline, vol. 4, article no. 2259, 2013. www.nature.com/articles/ncomms3259.

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Kumar, Rupal, et al. “Obesity and Stress: A Contingent Paralysis.” International Journal of Preventative Medicinescribble-underline, vol. 13, no. 1, 2022, p. 95. pmc.ncbi.nlm.nih.gov/articles/PMC9362746/.

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Most, Jasper, and Leanne Maree Redman. “Impact of Calorie Restriction on Energy Metabolism in Humans.” Experimental Gerontologyscribble-underline, vol. 133, 2020, article no. 110875. ScienceDirect, sciencedirect.com/science/article/abs/pii/S0531556519308642?via%3Dihub.

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Sanyal, Debmalya, and Moutusi Raychaudhuri. “Hypothyroidism and Obesity: An Intriguing Link.” Indian Journal of Endocrinology and Metabolismscribble-underline, vol. 20, no. 4, 2016, pp. 554–57. PubMed Central, pmc.ncbi.nlm.nih.gov/articles/PMC4911848/.

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