http://www.nhs.uk/news/2016/07July/P...d-to-know.aspx
I take Vit D in winter, as my levels get very low - I can't see how anyone could get enough in the UK in winter.
I take various meds each day, mainly for thyroid and adrenals; a multivitamin, and additional vitamin E, calcium, magnesium and zinc. Who knows if the vitamins help anything, but I seriously doubt they are doing any harm.