The surprising connection: How digestion influences weight-loss

In the past, you probably found losing weight was relatively easy. However, nowadays, despite your best efforts, traditional methods like calorie counting and strict low-fat diets are yielding little to no results. So, what’s going on?


The truth is, there's a complex web of processes occurring within your body that remain hidden from plain sight. These processes play a significant role in your weight-loss journey, and understanding them is crucial to unravelling the mystery behind your lack of progress.

Research during the past two decades has revealed that gut health is critical to many health conditions (either directly or indirectly) and an unhealthy gut can contribute to a wide range of health problems and symptoms, and impact how well you manage your weight or your ability to lose weight. In recent years, the connection between digestion and weight-loss has gained growing attention as scientists delve deeper into understanding the complex relationship between the gut and overall health.

In this article, we'll explore the power of diet, supplements, and lifestyle changes in improving digestion and aiding weight-loss.

The gut-weight connection

Your digestive system plays a crucial role in the absorption, breakdown, and utilisation of nutrients. However, it is not just about the calories consumed; it's also about how effectively our bodies process those calories. A healthy gut ensures proper nutrient absorption, hormone regulation, and efficient elimination of waste, all of which contribute to maintaining a healthy weight.

When the gut is imbalanced or compromised, it can lead to various digestive disorders like constipation, bloating, or irritable bowel syndrome (IBS). Additionally, an unhealthy gut or diet may impair the regulation of certain hormones, including those involved in appetite regulation. This can result in increased cravings, overeating, and difficulties in maintaining a healthy weight.

Dietary changes for a healthy gut and weight-loss

One common issue I frequently encounter in my clinic is an imbalance in the types of foods my clients are consuming, which may not align with what your body currently needs and is neither beneficial for your gut health nor weight-loss.

A key factor at play here is how your body responds to the hormone insulin, responsible for regulating carbohydrate metabolism. If you eat the 'wrong' type of carbs or too much of them, the body produces too much glucose (sugar) too quickly. As your body needs to get glucose out of your bloodstream and into your cells, it is often stored as fat. This is not beneficial for your gut microbiome either.

Adopting a diet that supports weight-loss and a healthy gut can help you to lose weight and increase your overall sense of well-being. Below are some key dietary changes I help my clients incorporate into their lives:

  • Increasing fibre intake: Fibre-rich foods like fruits, vegetables, whole grains, and legumes provide nourishment for beneficial gut bacteria. They also help regulate bowel movements, prevent constipation, and promote a feeling of fullness, aiding weight management.
  • Limiting processed foods and sugar: Highly processed foods and excessive sugar can disrupt the gut microbiota, promote inflammation and contribute to weight gain and obesity. Opting for whole, unprocessed foods and limiting added sugars can help you to maintain a healthy gut and achieve weight-loss goals.
  • Including protein and fats: Starting the day with protein and a bit of fat (eating fat does not = putting on fat) can help you regulate your appetite.

When I’m working with my clients, I help to ensure that they consume what their body truly needs for nourishment while also incorporating delicious options that allow them to savour life's special moments. By doing so, they can still indulge in experiences like enjoying a glass of wine or a slice of chocolate cake from time to time.

Supplements for gut health and weight-loss

In addition to dietary changes, certain supplements, such as the ones below, can be beneficial for improving gut health and supporting weight-loss. However, it is important to work alongside a nutrition professional before starting any new supplements.

  • Probiotics: Probiotic supplements can help restore the balance of beneficial bacteria in the gut, improving digestion and reducing inflammation.
  • Digestive enzymes: Digestive enzymes aid in the breakdown of food and enhance nutrient absorption. They can often be helpful if you have a digestive disorder or struggle with nutrient deficiencies.
  • Fibre supplements: If it is challenging to meet daily fibre requirements through diet alone, fibre supplements can provide additional support for gut health and weight-loss.

In addition to the above, functional testing can be very helpful to work out exactly what supplement support you need and what is knocking you out of balance and I often help client tailor their supplement programme to their needs.

Lifestyle changes for a healthy gut and weight-loss

Alongside dietary modifications and supplements, certain lifestyle changes can further help digestion and support weight-loss efforts. Here are some key lifestyle factors to consider:

  • Regular exercise: Engaging in regular physical activity can improve digestion, regulate bowel movements, and aid in weight management.
  • Stress management: Chronic stress can negatively impact gut health and hinder weight-loss progress. Practising stress management techniques such as meditation, yoga, or deep breathing exercises can help promote a healthy gut and facilitate weight-loss.
  • Prioritise sleep: Quality sleep is also essential for maintaining a healthy gut and optimal weight. Lack of sleep can disrupt hormone regulation, increase cravings, and impact digestion. This is an area I often help my clients with.

When I work with my clients, while I understand that they ‘want to lose weight’, I know that my job is to get them back into balance, so that they can finally get to their happy weight as well as experience a renewed sense of well-being and radiance.

To learn more about how I can help you, please schedule a complimentary call today.

The views expressed in this article are those of the author. All articles published on Nutritionist Resource are reviewed by our editorial team.

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London SW15 & W1H
Written by Melody Mackeown, mBANT, CNHC, BSEM | Nutritional Therapist and Health Coach
London SW15 & W1H

My name is Melody. I am a Nutritional Therapist and Health Coach with over 15 years expertise in helping people fix their gut issues and providing them with effective solutions.

I see clients via Zoom or in person.

Please book a complimentary call now by clicking the button below or call or email me on: 07790 831 254 or

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