John Boyd Orr
He went back to Aberdeen in early 1919 to set up the Rowett Research Institute, named after John Quiller Rowett, who donated a lot of money to it. He set up an  experimental farm of around 1,000 acres. He raised a lot of money but  later he said, "I still look with bitter resentment at having to spend half my time in the humiliating job of hunting for money for the Institute."  He moved from animal nutrition research to human nutrition. In 1927 he proved the value of milk being supplied to school children, which led to free school milk  in the UK. His 1936 report "Food, Health and Income" showed that at least one third of the UK population were so poor that they could not afford to buy enough food to provide a healthy diet. It showed that there was a link between low-income, malnutrition and children doing badly in schools.