Question: what vitamins to take at night?
Answer: Vitamin D. The 'sunshine vitamin' is thought to influence both sleep quality and quantity, and studies have shown that Vitamin D deficiency is associated with less sleep overall and also, with more disrupted sleep. ...  Melatonin. ...  Iron. ...  Calcium. ...  Magnesium. ...  Vitamin E. ...  B vitamins. ...  Valerian.