Table 1.

Recommendations for Treatment of Vitamin D Deficiency or Insufficiency

Serum 25(OH)D Level (ng/mL)	Vitamin D3 Supplementation Dose (IU)	Frequency of Vitamin D Supplementation
20-30	1,000-2,000	daily
12-20	2,000	daily
< 12 (asymptomatic)	4,000-5,000	daily
< 12 (symptomatic)	30,000	weekly

NOTE. These doses are in addition to what the patient is ingesting at baseline. Patients receiving more than the equivalent of 2,000 IU of vitamin D3 daily in supplements should have 25(OH)D levels monitored approximately every 12 weeks.