Gut and Skin Health Expert Blog | The Y Collection

Does Your Gut Health Affect Weight Loss?

by Jelena Vulevic on Aug 21, 2023

Maintaining a healthy weight is a top concern for many. Recent scientific research highlights an intriguing link between gut health and weight loss. The gut's complex ecosystem of microbes plays a crucial role in digestion, nutrient absorption, and overall health. Studies suggest that gut bacteria composition can impact metabolism, appetite regulation, and inflammation, influencing weight. In this article, we explore the connection between gut health and weight loss, examining scientific evidence and potential implications for long-term weight management goals.

Good gut health could be the key to achieving your goal weight. Find out if Y GUT sensitive is right for you. 

Gut health & metabolism 

Recent research has highlighted the profound impact of gut health on metabolism — the intricate process by which our bodies convert food into energy. A healthy gut is essential for an appropriate and enhanced metabolic function by ensuring the efficient nutrient absorption and reducing the impact of inflammatory compounds that can dysregulate immune function and lead to significant metabolic issues.  

Imbalances in the gut microbiota composition, known as dysbiosis, can lead to increased calorie extraction from food, impaired glucose metabolism, chronic low-grade inflammation and inappropriate hormone production and signalling. Concurrently, balanced, and stable gut microbiota can produce a variety of compounds that can promote satiety, improve insulin sensitivity, and reduce inflammation.

Furthermore, the gut microbiota communicates directly with our body's metabolic processes through the gut-brain axis. This bidirectional communication network involves intricate signalling between the gut and the brain, influencing food intake, energy expenditure, and the regulation of fat storage. Disruptions in this communication disrupts metabolic homeostasis (the body’s ability to maintain a stable and balanced internal environment for its chemical reactions and energy usage) and can lead to weight gain.

Gut Hormones 

Gut hormones have a significant impact on our eating habits and behaviours by relaying information between the gut and the brain. Ghrelin, the "hunger hormone," stimulates appetite, but factors like sleep deprivation and stress can disrupt its regulation. While we can't directly control ghrelin levels, consistent sleep, stress management, and balanced meals help maintain a healthier balance.

Appetite suppressant hormones, like PYY and GLP-1, promote fullness and satiety. Protein-rich meals, high-fibre foods, and hydration support optimal levels of these hormones for weight management.

Leptin, the "satiety hormone," signals to the brain that we have enough energy stores. Obesity can lead to leptin resistance, but maintaining a healthy weight, regular physical activity, and sufficient sleep may improve leptin sensitivity.

Though we can't fully control gut hormone release, we can adopt strategies to support their function. Prioritising a gut health diet, regular meals, adequate sleep, stress management, and maintaining a healthy weight positively influence gut hormone release. Regular exercise and mindful eating also contribute to healthier eating behaviours.

Gut bacteria - are they all friendly? 

Gut bacteria, collectively known as the gut microbiota, form a diverse community of microbes in our digestive system. While commonly referred to as "friendly bacteria," the reality is more nuanced. Only a small proportion of gut bacteria are exclusively harmful, while hardly any are exclusively beneficial, with the majority falling into a neutral category. The impact of these bacteria depends on your diet and lifestyle choices. When the gut is balanced, the bacteria play a crucial role in supporting the gut and overall health. However, imbalances caused by disease, diet, medication, or lifestyle can disrupt the gut bacteria and lead to the production of less beneficial and inflammatory compounds. This imbalance also allows harmful bacteria to thrive, contributing to various issues such as digestive and metabolic disorders, inflammation, and weight gain. Maintaining a balanced diet and lifestyle is essential to preserve a diverse and healthy gut microbiota, which is crucial for optimal overall health.

Emerging scientific research suggests that certain bacteria within the gut microbiota may be associated with weight gain or weight loss. However, the gut microbiota is highly complex and individual-specific. The presence or abundance of specific bacteria does not necessarily determine weight gain or weight loss in isolation. Various factors, including diet, genetics, lifestyle, and overall microbial diversity, interact to influence body weight and metabolic processes. Therefore, focusing on overall gut health by removing signs of an unhealthy gut including a balanced diet, exercise and managing stress are keys for supporting weight management goals. 

The link between gut health and obesity 

Growing research suggests a link between gut health and obesity. Studies have shown that individuals with obesity often have an altered composition of gut bacteria, potentially contributing to weight gain by increasing calorie extraction and energy harvest. Conversely, lean individuals tend to have a more diverse gut microbiota, associated with better metabolic health and lower obesity risk.

Animal studies support this link, as transplanting gut microbiota from obese animals into lean animals induces weight gain and metabolic issues in the recipients. However, causality has not been definitively established, and further research is needed to fully understand the relationship.

Nonetheless, optimising gut health through gut-friendly foods, supplements, and lifestyle interventions remains crucial for overall health and may have implications for weight management and metabolic health.


The role of supplements in gut health and weight loss 

Embarking on a journey through the realm of weight loss supplements, we unravel the potential effectiveness and considerations surrounding ten popular options: 

  1. Probiotics, prebiotics and postbiotics: Probiotics (live microbes), prebiotics (food for probiotics) and postbiotics (metabolites of probiotics) are functional foods that belong to a group called biotics. They can be very effective in gut repair and an overall support of gut health. Specific to weight management, these supplements can help in reducing inflammation, promoting a diverse microbiota, regulating metabolism, improving appetite and modulating fat absorption. Definitive answers on which ones are the best are still lacking because results vary among individuals. However, some probiotic strains of lactobacilli and bifidobacteria have been shown to help reduce weight. Prebiotics inulin and galactooligosaccharides (GOS) could help with reducing metabolic markers and postbiotics short-chain fatty acids and beta-glucans could help regulate appetite and reduce inflammation.
  2. Fibre: Fibre supplements can aid in appetite control, as they promote a feeling of fullness. Psyllium husk and glucomannan are best researched and popular options that can aid in weight loss when taken as part of a reduced-calorie diet. If taken in large quantities, it’s essential to consume enough water with these supplements to prevent potential choking or blockage in the oesophagus.
  3. Green Tea Extract: Catechins from green tea have been linked to increased calorie burning and improved fat oxidation. While it may have modest benefits for weight loss, results are not dramatic, and healthy eating and exercise remain essential. High doses of green tea extract may cause caffeine-related side effects like jitteriness or sleep disturbances.
  4. Garcinia Cambogia: This supplement contains hydroxycitric acid (HCA), believed to inhibit an enzyme involved in fat storage. Some studies suggest mild weight loss effects, but evidence is mixed, and larger, long-term studies are needed. Be cautious of low-quality products, as they may contain fillers or additives.
  5. Chromium: Chromium is thought to improve insulin sensitivity and promote weight loss. While some studies support its use, results are not consistent, and it’s not a magic solution for weight management. Individuals with diabetes or other medical conditions should consult a healthcare professional before supplementing with chromium.
  6. CLA (Conjugated Linoleic Acid): CLA is a fatty acid that may have modest effects on fat metabolism and body composition. However, results can vary, and it’s not a substitute for a healthy diet and exercise. Be aware of potential digestive discomfort when starting CLA supplements.
  7. Apple Cider Vinegar: Some studies suggest its aid in weight loss by promoting feelings of fullness and reducing calorie intake. However, more research is needed to confirm its effectiveness, and it should not replace a balanced diet and active lifestyle.
  8. L-Glutamine: An amino acid that has been suggested to help reduce cravings for sugar and carbohydrates, but scientific evidence is limited to support this claim. 
  9. Collagen: a protein widely used for skin health and joint support with a potential to impact appetite and muscle mass. However, scientific evidence supporting collagen supplements for weight loss is lacking. 
  10. Raspberry Ketone: a compound found in red raspberries that has been suggested to increase the breakdown of fat, thus promoting weight loss. However, scientific evidence supporting this claim in humans is scarce, and most studies have been conducted on animals. 

As with any supplement, it's crucial to approach them with a critical eye and consult a healthcare professional before incorporating them into your weight loss regimen. While these supplements may have some potential benefits, they are not a substitute for a healthy diet, regular exercise, and overall lifestyle changes to achieve sustainable weight loss. Additionally, be cautious of supplements that promise rapid or effortless weight loss, as there are no shortcuts to achieving a healthy weight.

So, is poor gut health the reason you’re not losing weight? 

Poor gut health can influence weight management through various mechanisms as mentioned above. An imbalanced gut microbiota, characterised by an overgrowth of harmful bacteria and a decrease in beneficial bacteria, may lead to inflammation, metabolic disruptions, and altered energy extraction from food. These factors can contribute to difficulties in losing weight. An unhealthy gut impacts hunger-regulating hormones leading to increased appetite and difficulty in feeling full after meals. This can result in overeating and hinder weight loss efforts.

What you can do to improve your gut health and aid with weight loss 

  • Incorporate probiotic-rich foods like yoghurt, kefir, sauerkraut, and kimchi into your diet to promote a healthy gut microbiota.
  • Consume prebiotic foods such as garlic, onions, bananas, and asparagus to nourish beneficial gut bacteria.
  • Increase fibre intake with whole grains, fruits, and vegetables to support gut health and enhance feelings of fullness.
  • Practise mindful eating, chew food thoroughly, and avoid overeating to aid digestion and avoid unnecessary calorie intake.
  • Stay hydrated with water to support digestion and overall gut function.
  • Engage in regular physical activity to promote a healthy metabolism and weight management.
  • Manage stress through techniques like meditation, yoga, or hobbies, as stress can negatively impact gut health and weight management.
  • Get sufficient sleep to support gut health and regulate appetite-regulating hormones.
  • Limit processed and sugary foods, as they can disrupt gut balance and hinder weight loss efforts.
  • Incorporate science-backed gut health supplements. Our Y GUT sensitive contains 3 ingredients (GOS, beta-glucan and glucomannan) that have been shown to significantly impact gut health.

Key Takeaways 

While gut health is crucial for  overall health and it can play a role in weight management, it is essential to remember that weight loss is a multifactorial process influenced by genetics, diet, physical activity, stress levels, sleep, and other lifestyle factors. Addressing gut health through a balanced diet, the right gut health supplements, and other gut-supportive practices can be beneficial as part of an overall approach to weight management, but it’s not the sole determinant of weight loss success. Consulting with a healthcare professional or registered dietitian can provide personalised guidance on effective and sustainable weight loss strategies.

Good gut health could be the key to achieving your goal weight. Find out if Y GUT sensitive is right for you.