Article Detail Who invented Vitamin D ? Answer: Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922 Similar Questions : 1. Who invented Nylon ? Answer: Wallace Carothers 2. Who invented Periodic table ? Answer: Dmitri Mendeleev invented Periodic Table 3. Who invented Ball-Point Pen ? Answer: John J. Loud of U.S.A. in 1888 4. Who invented Relativity Theory ? Answer: Einstein of Germany in 1905. 5. Who invented Circulation of blood ? Answer: William Harvey of Britain in 1628 6. Who invented Bakelite ? Answer: Leo H. Baekeland of Belgium in 1907. 7. Who invented CT scan ? Answer: Hounsfield by Britain in 1973. Read more from - Important Inventions