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“that is one that we can supplement safely up to about 4,000 IUs international units... vitamin D is hugely important in multiple enzyatic processes”— Mary Claire Haver
“vitamin D and melatonin I think is a great neuroprotective antioxidant supplement to take at nighttime.”— Dominic D'Agostino
“I supplement with vitamin D. I think it's there's a benefit to supplementing with vitamin D, no question.”— Dr. Roger Seheult