India, Oct. 21 -- The chill is setting in, and so is the pollution. Delhi's Air Quality Index (AQI) touched 187 on Sunday before improving to 139 on Monday, according to the Central Pollution Control Board (CPCB). Mumbai, too, recorded an AQI of 187. With winter approaching, doctors warn that air quality could deteriorate further and advise residents to take precautions. "Children under 10, the elderly, and those with pre-existing respiratory or cardiac conditions are especially vulnerable," says Dr Devendra Taneja, Shalby International Hospital. Dr Akshay Budhraja of Aakash Healthcare suggests switching to indoor activities instead of outdoor exercise: "The best time for outdoor workouts is when the AQI is relatively low, typically late morning or afternoon." Dietitian Meenakshi Aggarwal of Marengo Asia Hospitals recommends a balanced diet rich in amla, oranges, berries, leafy greens, whole grains, nuts and seeds. While turmeric milk, Tulsi adrak chai, ginger lemon kadha and jaggery are often recommended for anti-inflammatory and antioxidant properties, experts say no foods can reverse the effects of air pollution. Minimising exposure remains the most effective precaution....