That point is a painful one for Elina Ansary, 22, a senior in the painting department.

WSJ: Pratt Fire Destroys, Inspires

Lead author Dr Elina Hypponen, from the University College London Institute of Child Health, said the study "highlights the importance of monitoring and treating vitamin D deficiency in people who are overweight or obese".

BBC: Study finds obesity can 'lead to lack of vitamin D'