Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Reference Guide
Vitamin D

Vitamin D

Vitamin D
Vibrant & Rupa Partnership Ended Feb 1st.
Vibrant Wellness & America are no longer available on platforms like Rupa, but we’ve created a list of comparable tests. You can also talk to a Rupa rep to help you transition to alternatives! Learn more.
Sign up free to order the 
Vitamin D
One login for 30+ lab companies.
Start an Order

About the Test

This is a single-marker test measuring Vitamin D.

Ordering the Vitamin D Test From Ayumetrix

A vitamin D test measures the level of vitamin D in the blood. This vitamin is essential for healthy bones and teeth as its biological function is to maintain normal calcium and phosphorus absorption levels. It also helps keep nerves, muscles, and the immune system working properly.

Low vitamin D levels can lead to bone disorders and other medical issues.

Vitamin D can be obtained in three ways.

  • The body produces vitamin D when bare skin is exposed to sunlight
  • Vitamin D can also be absorbed from certain foods
  • Vitamin D supplements can increase the levels in the blood

There are 2 Different Types of Vitamin D Tests:

Both forms of vitamin D (ergocalciferol and cholecalciferol) work similarly in the body.

  • Most vitamin D tests measure the level of 25(OH)D in the blood. 25 hydroxy vitamin D3 (cholecalciferol) is the vitamin D the body produces or absorbs from an animal source or a cholecalciferol supplement.
  • 25 hydroxy vitamin D2 (ergocalciferol) can be measured. This vitamin D is absorbed from foods fortified with plant vitamin D or an ergocalciferol supplement.

Vitamin D Levels

Which Patients is the Vitamin D Test From Ayumetrix Best Used For?

A vitamin D test is used to screen for vitamin D levels in the blood. If the levels are low, an individual can be treated with supplements before it causes health disorders.

Those who are at high risk of having low levels of vitamin D include:

  • Lack of skin exposure to sunlight
  • Older adults
  • People with obesity
  • Babies who are breastfed only (formula is usually fortified with vitamin D)
  • People who have had gastric bypass surgery
  • People who have a disease that affects the intestines and makes it difficult for the body to absorb nutrients, such as Crohn’s disease
  • Lack of enough vitamin D in the diet
  • Liver and kidney disorders
  • Use of certain medications

About the Test

This is a single-marker test measuring 25-hydroxy Vitamin D. It can be used to monitor the effectiveness of supplementation and to assess patients with low calcium levels or symptoms of vitamin D deficiency.

More Resources

No items found.


25-Hydroxy Vitamin D
25-Hydroxy Vitamin D
Start an Order
Lab Test Information
Sign up to View
Lab Company
Sample Type
Blood Spot
Shipping Time
3 - 5 days
Turnaround Time
8 days
Test Preparation Starts
No test preparation required
Number of Collection Days
1 day
Methods Used For Processing
Lab Certifications
CLIA Certified
CAP Accredited
ISO 15189
COLA Accredited
Order, track, and receive results from 30+ labs in one place.