The Best Time to Take Vitamin D for Optimal Sleep and Health Verywell Health Seize the D: Why summer is the perfect time to get serious about the sunshine vitamin The Irish News Can Vitamin D Help Treat Depression? Yahoo Health Doctors say low vitamin D is more common than you think, yet the signs you keep ignoring often hide behind everyday tiredness OkDiario How low vitamin D levels affect your hormones, mood The Eastleigh Voice