Beyond Sunshine: A Dietitian’s Take on Daily Vitamin D and When It Truly Helps

A dietitian explains why she takes a daily vitamin D to maintain sufficient levels, noting that benefits are greatest when correcting a deficiency rather than adding to already sufficient levels. Evidence suggests adequate vitamin D supports bone health, immune function, and respiratory health, and may lower all-cause mortality risk in deficient individuals. Those with sufficient levels may not notice daily improvements, and excessive dosing can lead to hypercalcemia, so vitamin D supplementation should be guided by medical advice.