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Longevity & General Health Monitoring
October 19, 2025

The Hidden Link Between Gut Health and Body Composition

Gut health affects fat storage, muscle gain, and metabolism. Learn how DEXA Scan reveals the hidden impact of your gut on body composition.

Author
5 min read
The Hidden Link Between Gut Health and Body Composition

When people think about improving their body composition, they usually focus on diet, exercise, and sleep. But one of the most overlooked factors influencing fat storage, muscle gain, and metabolism is gut health.

At Kalos, we use DEXA Scan technology to give clients a clear picture of how internal factors like digestion and inflammation affect their body composition. A healthy gut doesn’t just aid digestion — it shapes how efficiently your body absorbs nutrients, builds lean mass, and burns fat.

How Gut Health Affects Your Body Composition

1. Nutrient Absorption

Your gut is responsible for breaking down and absorbing nutrients like amino acids, fatty acids, and vitamins. When your microbiome is imbalanced, your body absorbs fewer nutrients from food, which can slow muscle growth and recovery.

2. Inflammation and Fat Storage

An unhealthy gut can increase systemic inflammation, elevating cortisol and insulin resistance — two hormones that promote visceral fat accumulation around the organs.

3. Metabolism and Energy Regulation

Your gut bacteria influence how efficiently your body converts food into energy. A disrupted microbiome can make you store more calories as fat, even when eating the same amount.

4. Mood and Cravings

Up to 90% of serotonin is produced in the gut. Poor gut health can lead to mood fluctuations and sugar cravings that sabotage consistency with diet and training.

What DEXA Scans Reveal About Gut Health Effects

While a DEXA scan doesn’t measure gut bacteria directly, it reveals their downstream impact on body composition. Clients struggling with gut imbalances often show:

  • Increased visceral fat, especially around the abdomen.
  • Decreased lean mass due to poor nutrient absorption.
  • Unexplained changes in fat-to-muscle ratio, even with consistent training and diet.

By tracking these changes over time, a DEXA scan helps connect the dots between internal health and physical outcomes.

How to Improve Gut Health for Better Body Composition

1. Eat a Diverse Diet

Aim for a variety of plant-based foods, lean proteins, and fermented products to feed beneficial bacteria.

2. Prioritize Fiber

Fiber fuels gut bacteria that help regulate inflammation and digestion. Aim for 25–35 grams per day.

3. Manage Stress and Sleep

High stress and poor sleep disrupt gut-brain communication, leading to hormonal imbalances and cravings.

4. Avoid Excess Processed Foods

Artificial sweeteners, refined carbs, and alcohol can disrupt gut flora and increase inflammation.

5. Track Progress with DEXA

A DEXA scan helps verify that improvements in gut health are reflected in better fat-to-muscle ratios and lower visceral fat.

Your Gut: The Missing Piece of the Fitness Puzzle

A healthy gut means better nutrient absorption, stronger metabolism, and more efficient fat loss. By combining targeted gut health improvements with DEXA Scan tracking, you can understand how internal balance leads to external transformation.

Book Your DEXA Scan with Kalos Today in Downtown San Francisco or Palo Alto!

If you’re ready to take control of your health with the most accurate body composition analysis available, it’s time to book your DEXA scan at Kalos. Whether you’re looking to get lean, build muscle, improve performance, or optimize longevity, our advanced technology and expert guidance will help you get there.

Schedule your scan today at Kalos, your journey to data-driven fitness starts now.

Schedule your DEXA scan today!

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