Doctor explains how leftover biryani can be a game-changer for your gut

It may sound unexpected, but refrigerated biryani left from the previous meal can actually be beneficial for the digestive system. According to doctor and digital health educator Karan Rajan, cooling cooked rice in the fridge alters its composition. When rice chills overnight, it develops resistant starch — a type of prebiotic fuel that friendly gut microbes thrive on. This altered starch behaves more like dietary fibre than a conventional carbohydrate, helping the body feel full for longer, moderating blood sugar spikes, and supporting smoother digestive activity.

Why Cold Biryani Supports a Stronger Microbiome

Reheated biryani doesn’t just offer comfort; it delivers science-backed advantages. The fragrant spices used in this classic dish contain polyphenols, antioxidant powers, and natural antimicrobial properties. These compounds nourish diverse gut bacteria and help maintain balance in the digestive tract. Each spice contributes its own bioactive benefits, making the dish a powerhouse of plant-based nourishment.

How Meat and Vegetables Add Additional Benefits

If the biryani includes lean, unprocessed meat, it becomes an even more nutrient-dense meal. Such meat supplies vitamin B12, iron, zinc, and essential amino acids—nutrients that strengthen the gut lining and support the body’s defence cells. The vegetables and herbs mixed into the biryani bring fibre, phytonutrients, and digestive support, helping the microbiome regulate metabolism more efficiently.

About Dr. Karan Rajan

Karan Rajan is a medical professional, writer, and well-known voice in online health education. He authored This Book May Save Your Life, which became a Sunday Times chart-topper. He studied at Imperial College London and later created LOAM Science, a venture centred on health innovation. With a social media community of over two million, he regularly breaks down medical topics into simple, practical advice that blends evidence with everyday living.