In the town of Salem in the Madras Presidency, on 29 November 1918, a boy named Coluthur Gopalan was born into a traditional household. His father was a police officer. At the age of ten the family moved to Madras, where young Gopalan studied at Madras Christian College Higher Secondary School and later entered Madras Medical College. He earned his MD in General Medicine from the University of Madras in 1943.

The Bengal Famine of 1942 left a deep mark on him. While still a medical student he read of the suffering and the empty bowls, and something inside him shifted. “Disease is not only what happens in the hospital,” he would later say. “It begins long before—in the fields, in the kitchens, in the empty stomachs of children.” He decided that his life’s work would be the investigation and mitigation of nutrition-related problems, especially among the disadvantaged.

In 1946 he became the first Indian to win a Nuffield Foundation research scholarship. In London he completed both a PhD and a DSc in nutrition in an extraordinarily short time. When he returned to India in 1949 he joined the Nutrition Research Laboratories in Coonoor. When the laboratory moved to Hyderabad and grew into the National Institute of Nutrition, Gopalan became its Director (1961–1974). Under his leadership the institute expanded into clinical research, biochemistry, endocrinology, food toxicology and field studies. He analysed more than five hundred Indian foods and published the landmark Nutritive Value of Indian Foods—a book that is still called the Bible of nutrition scientists in India. For the first time a developing country had its own recommended dietary allowances based on local foods.

His research helped shape some of the most important public-health programmes in independent India: the Integrated Child Development Services (ICDS), the midday meal scheme for schoolchildren, the national programmes against nutritional anaemia and vitamin-A deficiency, and the goitre-control effort through iodised salt. He showed that both kwashiorkor and marasmus were forms of protein-energy malnutrition, challenging prevailing international views with careful Indian data.

From 1974 to 1979 he served as Director-General of the Indian Council of Medical Research, strengthening institutions and opening new centres for research on major diseases. After retirement he founded the Nutrition Foundation of India and remained its guiding spirit for more than four decades.

Honours came steadily. The Government of India awarded him the Padma Shri in 1970 and the Padma Bhushan in 2003. He was elected a Fellow of the Royal Society of London in 1987, received the WHO Health for All Medal, the International Union of Nutrition Sciences Living Legend Award, and many others. Yet he remained the same quiet, meticulous scientist who preferred the laboratory and the village survey to the spotlight.

Dr. Coluthur Gopalan lived a full century, passing away in Chennai on 3 October 2019 at the age of one hundred. In the story of modern India his name stands for a simple but powerful truth: that the health of a nation begins with the food on its poorest plates, and that science, when guided by compassion, can change the destiny of millions of children.