Later, he went to London for higher studies in endocrinology and nuclear medicine, returned to his alma mater, in 1970, to work there till 2000.
[1] He is reported to have developed T3 and TSH hormone tests[7][8] and the technique to contain cancerous cells using isotopes, deploying a therapeutic protocol called radio-bioconjugate therapy.
He asserted that iodized salt, contrary to popular belief, has an adverse effect on human physiology, especially in the care of women.
[1] One of the early Indian medical scientists in the area of evidence based endocrinology, Dr. Hazra pioneered the studies on small intestines functions in diabetes mellitus.
[1][11] He is a frequent speaker at various national and international seminars,[2][12] and has published over 100 research papers in peer reviewed journals of repute.