Nutritionist Dr Rohini Patil, Founder of Nutracy Lifestyle, said foods like citrus fruits, leafy greens, garlic, turmeric, yoghurt, nuts, seeds and pulses can strengthen immunity during winter. Rich in vitamin C, antioxidants, probiotics, protein and healthy fats, they support cell repair and reduce inflammation. Pairing these foods with adequate sleep and movement helps keep flu symptoms at bay.