Does anyone know why, despite the NHS advice that ‘children aged 1 to 4 years old should be given a daily supplement containing 10 micrograms of vitamin D’, and ‘everyone...should consider taking a daily supplement containing 10 micrograms of vitamin D during the autumn and winter’, so many of the vitamins you can buy only contain 2.5 or 5 micrograms of Vitamin D? Many of them say to take one a day, so this just wouldn’t be enough. Boots make a gummy multivitamin with the full 10 micrograms in, so it’s obviously possible. I’m trying to prepare the DC’s immune systems for the return to school/nursery and it’s something I’ve noticed with a lot of them.