Vitamin D Test

Sale price$99.00



You should take this test if you

✔  Do not get daily sun exposure or live in a northern latitude

✔  Have issues with small intestine absorption or kidney function 

✔  Do not consume adequate vitamin D

✔  Are an athlete

✔  Follow a strict vegan diet

✔  Are overweight or obese

✔  Have darker-pigmented skin

✔  Are elderly 


Potential Symptoms

Potential symptoms of low vitamin D

Although having a low level of vitamin D is often asymptomatic, you might experience:

  • More frequent infections
  • Fatigue
  • Muscle or bone discomfort
  • Depressed mood


If you have any of the following symptoms that are, or can be, associated with a vitamin D deficiency, then you should consult with your health-care practitioner:

  • Muscle spasms and twitching (which can be anywhere but are more common in the face and around the mouth or eyes)
  • Generalized weakness
  • Loss of balance/falling
  • Severe bone and joint pain – hip pain is most common
  • Unexplained fracture
  • An onset of seizures
  • Abnormal heart rate or rhythm
  • High blood pressure


Potential symptoms of high vitamin D

Although having a vitamin D level that is too high can be asymptomatic, with a very high level (usually a result of excess calcium absorption) you could experience:

  • Anorexia/loss of appetite
  • Vomiting
  • Diarrhea and/or constipation
  • Excessive thirst, dry mouth
  • Frequent urination
  • Fatigue
  • Dizziness
  • Muscle cramping/pain/twitching
  • Bone pain
  • Nerve pain (neuropathy)
  • Kidney stones
  • Confusion and weakness
  • Chest pain, irregular heart beat
  • Elevated blood pressure
  • Headaches
  • Cough, shortness of breath


If you suspect you might have an excess level of vitamin D (which only occurs with excessive supplementation and is very uncommon), then you should consult with your health-care practitioner.


What we measure

Vitamin D  •  Blood Spot

Vitamin D

Vitamin D is a fat-soluble vitamin that we obtain from some foods and nutritional supplements, or make in our bodies after exposure to sun. Vitamin D is important for bone health, immune function, heart health, mood, brain health, and metabolic health.



Vitamin D (Blood Spot Collection)

1. Test Activation

Login to You will send you an invitation email for you to sign up and log in for Thorne Research website. Click the ‘Activate Test’ button on top of the main homepage, and  Enter a 6-digit activation code on the back of the plastic clamshell box. To see your test result summary on’s ‘Test Result’ section, you MUST enter your ‘Test Status’ section and click the gray button to change its color to pink.  


2. Sample Collection 

You may collect your blood sample on any day you choose. Collect your sample in the morning before taking any medications. Don’t forget to write your name and the date and time of collection on the collection card prior to collecting.  Wipe finger with alcohol prep pad and select finger. Position finger oer circle of blood collection spot card and, as blood drop is ready to fall, touch drop to center of circle (one drop per circle). Continue collection until at least 6 circles have been filled.   


3. Sample Return 

Place the collection card into the plastic box in which they arrived. (Do NOT throw away the plastic box.) Apply a return label to the envelope and leave the envelope inside a mailbox or take it to any U.S. Postal Service (USPS) facility. Your shipping cost is prepaid.


What you'll discover


Your personal biomarker values are displayed on an easy-to-read dashboard with descriptions of what each biomarker value means for you.


Using your biomarkers, we provide detailed insights to help identify potential health risks or specific areas of improvement. Insights are generated using the Onegevity Health Intelligence platform.

Improvement Plan 

Based on your unique results, a comprehensive improvement plan with diet, activity, and supplement recommendations is generated.

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