Due to the current COVID-19 (Coronavirus) lockdown and the increased time inside most of the day and if you’re based in a non-sunny climate, your vitamin D level could possibly decrease.
Therefore, it might be worth considering taking a vitamin D supplement, usually more essential during the darker months (in the UK) of September to April but during these unusual times of staying indoors most of the time it’s perhaps wise until we are all able to return to some form of ‘normality’.
You can get some vitamin D from your diet if you eat oily fish, mushrooms and egg yolks (whole eggs basically), but the rest you need to get from sunlight.
You can currently go out to exercise once a day (walk, run, cycle) and you should if you can but also adhere to the rules to protect yourself, the most vulnerable and of course ALL the amazing people helping fight the war of this devastating virus! If you have zero symptoms, have an enclosed, garden, courtyard or balcony...