Can Gut Bacteria Cause Obesity? Science Says It Is Possible 

For years, scientists have observed that people with obesity tend to have different gut bacteria than lean individuals. But research suggests this is more than a coincidence:

Your gut microbiome may play a causal role in obesity. And that changes how we think about weight loss and how we support it.

A landmark review published in Nature Reviews Microbiology back in 2013 helped lay the foundation for this connection, sparking a wave of research into how gut bacteria influence body weight. Since then, ongoing studies have continued to build on these findings, paving the way for more personalised and potentially more effective weight loss strategies. [1] 

From Correlation to Causation 

Is One Bug Making You Gain Weight?

The authors propose applying Koch’s postulates (a classic framework used to prove microbial disease causation) to test whether certain gut bacteria cause obesity in humans.

It is a complex task, but early research supports the concept. Other studies have confirmed: 

These findings suggest that improving gut microbial balance could support weight loss, especially during medication-based interventions. 

How GLP-1s Affect the Gut 

GLP-1 medications like Ozempic®, Wegovy®, and Mounjaro® are powerful tools. [5] They: 

But they can also cause digestive side effects that make people stop early or make them use the drugs suboptimal. This leads to frustration, lower quality of life and not an optimal outcome of the therapy.

Common GLP-1 side effects: [6] 

Why Gut Health Matters During Weight Loss 

GLP-1s change what and how you eat. Appetite drops. Food variety narrows and changes. Fibre may decrease. All of this compromises your gut microbiome, which in turn affects:

• Energy levels.
• Inflammation.
• Nutrient absorption.
• How your body stores or burns fat.

That is why taking care of your gut is not just about comfort. It is about weight loss success. It is about health and happiness. It is about better results for you.

Where Forte80™ Comes In 

Forte80™ is a high-strength, clinically designed probiotic created to support individuals on a GLP-1 therapy. Whether you are taking Wegovy®, Ozempic®, Rybelsus®, Zepbound® or Mounjaro®, Forte80™ is your gut-health ally, designed to help you stay on track and feel your best.

With 80 billion CFUs per daily dose, Forte80™ delivers a potent combination of four scientifically selected strains that work in synergy to support gut balance, comfort, and resilience during weight loss.

The 3 Key Benefits of Forte80™: 

And did we mention the 80,000,000,000 CFU. That is the key to its efficiency.

Think of Forte80™ as a companion to your GLP-1 medication, not a replacement, but a critical support that helps you feel better, stay consistent, and unlock better long-term results. 

Final Thought: Your Gut Is Part of the Solution 

Weight loss is more than willpower or calories – it is also about what is living in your gut. The more we understand the microbiome, the clearer it becomes: supporting gut health is not a side note, it is a core part of the strategy.

Forte80™ helps you stay consistent, feel better, and give your body the best possible environment for sustainable change.