Forget detox drinks. Harvard-trained gastroenterologist Dr Saurabh Sethi shares 3 simple habits that naturally improve gut health

In our quest for flawless digestion, we frequently resort to quick fixes, trendy detox drinks, and restrictive cleanses. However, true wellness relies on sustainable lifestyle habits rather than viral remedies. Sustainable digestive wellness stems from consistent lifestyle choices that support your body's innate biological processes. Harvard-trained gastroenterologist Dr Saurabh Sethi recently shared 3 simple, natural habits on his Instagram post that can significantly improve gut health without expensive supplements.

Prioritise Daily Dietary Fiber

Consuming adequate dietary fiber is fundamental for optimal digestive performance. According to the Mayo Clinic, women should aim for roughly 25 grams of fiber per day, while men need around 38 grams.


Unfortunately, most adults consume only half of these recommended targets. Fiber acts as a prebiotic, feeding beneficial gut bacteria while adding necessary bulk to maintain regular bowel movements. To easily hit your daily goals, incorporate a colorful variety of whole fruits, leafy vegetables, chia seeds, and whole grains into your meals.

Integrate Fermented Foods Daily

Probiotics are essential for cultivating a diverse, resilient gut microbiome. Incorporating fermented foods into your daily routine—such as plain yogurt, traditional dahi, kefir, or buttermilk—delivers active live cultures directly to your digestive tract.

Research published by the Harvard T.H. Chan School of Public Health highlights that fermented foods introduce beneficial bacterial strains that enhance nutrient absorption, support immune function, and suppress harmful pathogens. Whether you choose dairy or plant-based options, consistency is key to reaping these microbial benefits.

Increase Daily Walking and Stay Hydrated

Physical activity plays a crucial role in internal motility. Regular walking stimulates natural intestinal contractions, encouraging smooth digestion and preventing sluggish bowel habits. According to Johns Hopkins Medicine, light movement accelerates gas transit and relieves constipation.

However, pairing physical activity and fiber intake with adequate water consumption is essential. Without proper hydration, fiber absorbs existing bodily fluids, leading to uncomfortable bloating and severe constipation. Always balance your fiber intake with plenty of water throughout the day.

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A post shared by Saurabh Sethi MD MPH | Gastroenterologist (@doctor.sethi)

Prioritising your gut health doesn’t require extreme cleanses or fancy supplements. By steadily increasing your fiber intake, enjoying probiotic-rich fermented foods daily, and staying active with regular walks and proper hydration, you give your digestive system the fundamental support it needs to thrive naturally for long-term health and vitality.