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Vitamin D is essential for immune system function and bone health.
That means some supplement products may not contain what the label says.
Vitamin D deficiency can cause tiredness.
Grace Cary / Getty Images
Studies have shown that vitamin D supplementation may improve fatigue in otherwise healthy individuals with a vitamin D deficiency.
Vitamin D Sources
Your body makes vitamin D when its exposed directly to sunlight.
Additionally, most people get less vitamin D during the winter months because of insufficient exposure to sunlight.
Vitamin D intake is measured in international units (IU) and micrograms (mcg).
The amount of the nutrient you need depends on your age and other health factors.
If your levels are low, your provider will likely recommend you take avitamin D supplementto correct the deficiency.
When selecting a vitamin D supplement, you may want to choose D3 over D2.
In most cases, toxicity occurs due to theoveruse of vitamin D supplements.
Interactions
Some medications may interact with vitamin D supplements, decreasing their effectiveness or causing side effects.
If you take any medications, check with your healthcare provider before taking a vitamin D supplement.
It may also help improve mood and protect against certain diseases.
Vitamin D is found in some foods, such as fatty fish and fortified dairy products.
The potential benefits of vitamin D supplementation are more significant in people with a confirmed deficiency of the nutrient.
2019;9(11):649. doi:10.3390/biom9110649
National Institutes of Health.Vitamin D : Consumer fact sheet.
Cui X, Eyles DW.Vitamin D and the Central Nervous System: Causative and Preventative Mechanisms in Brain Disorders.
2022 Oct 17;14(20):4353. doi: 10.3390/nu14204353.
PMID: 36297037; PMCID: PMC9610817.
2016;95(52):e5353.
doi: 10.1097/MD.0000000000005353
National Institutes of Health.Vitamin D: Health professional.
2016;95(52):e5353.
National Institutes of Health: Office of Dietary Supplements.Vitamin D: Fact Sheet for Consumers.
2021;109(2):157-178.
National Kidney Foundation.Vitamins and minerals in chronic kidney disease
