A nagging pain in the foot should not be brushed off as benign, as low levels have been linked to cancer, dementia, diabetes and arthritis.
Data published in medical journals has shown that supplementation slows bone loss and reduces fractures, particularly when taken with Calcium.
How to avoid vitamin D deficiency
The NHS explains: “From about late-March/ early April to the end of September, the majority of people should be able to make all the vitamin D they need from sunlight on their skin.
“Children from the age of one year and adults need 10 micrograms of vitamin D a day.