Vitamin D levels among people in Britain rose by almost one third last summer, according to a healthcare testing company. Medichecks compared data from 19,842 tests between March 2019 and February 2020, and 20,645 tests between March 2020 and February this year. It found levels of vitamin D increased by 28% year-on-year in June and by around 31% in September. The rise could be due to the Covid-19 pandemic leading to millions of workers being furloughed, or working from home, according to the company. Dr Sam Rodgers, chief medical officer at Medichecks, said: “The data is robust and shows a clear increase to vitamin D in the summer of 2020, common across males and females.