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Review
. 2021 Dec 10;13(12):4415.
doi: 10.3390/nu13124415.

Vitamin D Dosing: Basic Principles and a Brief Algorithm (2021 Update)

Andrius Bleizgys  1
Affiliations
Review

Vitamin D Dosing: Basic Principles and a Brief Algorithm (2021 Update)

Andrius Bleizgys. Nutrients. .

Abstract

Nowadays, in modern societies, many people can be at high risk to have low vitamin D levels. Therefore, testing of serum 25-hydroxy-vitamin D (25OH-D) levels should be performed before prescribing them vitamin D supplementation. However, in some cases the 25OH-D level assessment is not available at the right moment, e.g., due to mandatory quarantine of COVID-19 outpatients. Therefore, such patients could be advised to start taking moderate vitamin D doses (e.g., 4000 IU/day for adults), and their 25-OH-D levels could be checked later. The proposed algorithm also comprises vitamin D dosing principles when baseline 25OH-D levels are known.

Keywords: COVID-19; calcidiol; supplementation; vitamin D.

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Conflict of interest statement

The author declares no conflict of interest.

Figures

Figure 1
Figure 1
Brief algorithm for vitamin D dosing.
See this image and copyright information in PMC

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