The conversation between human and AI assistant.
[|Human|] When should I take vitamin D?
[|AI|] If you live in England, NHS recommends that people with vitamin D deficiency take supplements, other people should get vitamin D directly from the sun from April to September and take a supplement containing 10 Î¼g (400 IU) of vitamin D during autumn and winter.
[|Human|] 
When should I take vitamin D?