This is an old posting and I just came across it in GOOGLE. Apparently I need D3, and found drops with cholecalciferol.
It matters to me what the source is since I'm allergic to cod and to lanolin. Does anyone know FOR SURE where cholecalciferol comes from? One bottle says it's from cod liver oil, but most things I see online say it's from lanolin...who knows for sure? ANYONE?