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  Vitamin D Test

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Lab Test Description

Vitamin D Test

Vitamin D Deficiency

As much as 80% of the population in the United States is estimated to have low vitamin D levels. Emerging studies show that low vitamin D is associated with an increase cause of death from ALL causes1. Low vitamin D is also associated with autoimmune diseases and overall immune health.

Recommended add-on test: 1,25 Vitamin D (active form)

Vitamin D Deficiency Causes

In a society that has almost every vitamin D type food avaliable and abundant sunshine, many are left wondering, "Why are my vitamin D levels low"? The 7 most common causes for low vitamin D levels are:

  • Misuse/overuse of sunscreen 
  • Diet high in processed foods 
  • Inactivity 
  • Stress 
  • Smoking 
  • Obesity 
  • Thyroid issues 

Why Get Your Vitamin D Levels Checked?

This test will allow you to supplement with the correct dosage of vitamin D. Since you can overdose on vitamin D, it is recommend to be testing once a season in order to adjust supplementation and maintain optimal vitamin D levels.

Vitamin D deficiency has been shown in studies to increase the risk of:

  • Autoimmune conditions like Multiple Sclerosis and Hashimoto's
  • Type 1 Diabetes
  • Cardiovascular Disease
  • Increased blood pressure
  • Certain cancers

Vitamin D and Breast Cancer

Studies show a close correlation between optimal vitamin D and breast cancer. Many of these studies show that optimal vitamin D levels are associated with 50% decrease in breast cancer risk2.

Vitamin D Levels


What's Being Tested:

  • Vitamin D (25 HydroxyvitaminD- dieatary indicator; inactive form)
  • Calcium Serum

Fasting Required: No

Specimen: Blood (Draw Location | How It Works | FAQs)

1Dobnig H, et al. Independent association of low serum 25-Hydroxyvitamin D with all cause mortality. Archives of Internal Medicine. 2008 Jun 23:168:1340-1349.

2Vitamin D and prevention of breast cancer: Pooled analysis. The Journal of Steroid Biochemistry and Molecular Biology Volume 103, Issues 3-5, March 2007, Pages 708-711

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