If possible, it is reasonable to check their serum 25-hydroxy-vitamin D levels, and only after that, an appropriate dose of vitamin D supplements should be suggested.

Serum 25-hydroxyvitamin D — Vitamin D sufficiency is estimated by measuring 25-hydroxyvitamin D (25 [OH]D or calcidiol) concentrations. The optimal serum 25 (OH)D …

Oct 2, 2023 · Vitamin D is an essential vitamin supplement for maintaining health. Here’s our dosage guide, plus information on when to consult your healthcare provider about taking too …

Aug 11, 2025 · Most adults need 600–800 International Units (IU), or 15–20 micrograms (mcg), of vitamin D per day to support bone and immune health. The exact amount depends on your …

Mar 21, 2025 · Taking a vitamin D supplement or a multivitamin with vitamin D may help improve bone health. The recommended daily amount of vitamin D is 400 international units (IU) for …

Dec 20, 2024 · How much vitamin D do you need for optimal health? In the United States, current guidelines suggest that consuming 400–800 International Units (IU), or 10–20 micrograms …

Sep 10, 2025 · AACE guidelines and NOGG guidelines recommend that everyone with osteoporosis should maintain adequate vitamin D levels. Taking Vitamin D 1000 – 2000 IU …

Dec 5, 2024 · Below are general guidelines based on recommendations from health authorities like the Institute of Medicine (IOM) and Endocrine Society: Recommended daily intake: 400 IU …

Sep 11, 2023 · Over-the-counter vitamin D supplements can be found in various formats. Prescription high-dose vitamin D comes in six formats: 40 International Units is equal to 1 …

Check serum 25(OH) D after 3 months of therapy and every 3 months thereafter. If serum 25(OH) D is normal consider: 1) continued supplementation based on the clinical assessment of the …