Micronutrients like calcium and vitamin D are vital for adolescents as they support peak bone mass, protecting against osteoporosis later in life, Dr Vaishali Verma said. Iron is crucial, especially for adolescent girls, to prevent fatigue and anaemia, Verma added. Iodine and magnesium are vital for thyroid health and cognitive function, Meena Kumari, Chief Dietitian at Sarvodaya Hospital, said.