The Vibrant Wellness Podcast Heal Your Gut, Improve Your Life: The Power of the Microbiome with Dr. Karan Rajan, NHS
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Nov 19, 2025 
Dr. Karan Rajan, an NHS surgeon and popular health content creator, shares his insights on gut health and the microbiome. He discusses how your microbiome affects everything from mood to immune function. Karan emphasizes the importance of fiber, listing top sources like beans and berries. They delve into the connection between traditional diets and longevity, how stress impacts gut health, and practical tips for improving digestion. Ultimately, Karan encourages nourishing existing gut bacteria to optimize wellness.
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Microbiome Affects Whole-Body Health
- The microbiome influences metabolism, immunity, sleep, mood, and cognition beyond just digestion.
- Increasing dietary fiber can boost energy, alertness, and neuroprotection over weeks to months.
From Med School Tutorials To Global Education
- Karan Rajan began creating medical videos in 2010 to teach clinical exams to students.
- His early tutorials grew globally and led him into broader public health education online.
Use A Mix Of Fermentation Speeds
- Feed your microbiome with a mix of fast, medium and slow fermenting fibers to nourish the entire colon.
- Aim for fibers that reach the distal colon to support diverse bacteria and full short-chain fatty acid production.