NHS vitamins and minerals information
Between October and early March we don't get any vitamin D from sunlight
Vitamin D helps regulate the amount of calcium and phosphate in the body.
These nutrients are needed to keep bones, teeth and muscles healthy.
A lack of vitamin D can lead to bone deformities such as rickets in children, and bone pain caused by a condition called osteomalacia in adults.
Visit website: https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d/
See also: NHS - UK National Health Service, publicly funded healthcare system in England