Published on July 16, 2026
Gain access to an easy and inexpensive way to provide vitamin D testing and education for your practice, community or project
GrassrootsHealth is happy to have partnered with OmegaQuant Laboratory to offer CheckYourD branded wholesale vitamin D test kits for qualified individuals! There is no study enrollment or lengthy questionnaire requirement associated with these test kits, making it easier to access and offer testing to others.
CheckYourD.org provides a simplified vitamin D testing option geared towards:
- Health care professionals & practices
- Retail stores
- Educators
- Organizations
- Employers
- Brands
- Wellness Programs
- and Individuals
If you are a practitioner, retailer, educator, employer, or wellness program coordinator, you can access wholesale testing by completing the form at the link below, and we will be in touch with you to set up your account or order!
More Than Just A Test
Testing is just one piece of a complete vitamin D solution to help individuals optimize and maintain their target vitamin D levels. Access to wholesale testing makes what GrassrootsHealth has to offer through CheckYourD perfect for health organizations, corporate wellness programs, and health professionals.
A COMPLETE VITAMIN D OPTIMIZATION SOLUTION
- Blood Spot Test Kits – convenient and easy to use, in-office or at-home
- Risk Assessment Quiz – determine risk of vitamin D deficiency while educating about important factors and conditions related to vitamin D
- Dosing Calculator – personalize dosing with optional loading dose schedule
- Optimization Framework – with co-nutrient, lifestyle, and retesting
- Free Educational Resources – downloads and handouts to help motivate your patients to create and keep healthy vitamin D habits
- Online Education for Practitioners & Educators – anyone can access the eCourse here, plus it’s CE approved for nurses and acupuncturists!
Not a Practitioner or Retailer?
Individuals can access home vitamin D test kits for $65 (includes shipping, US only)
Available only to those who reside in the United States, we are able to offer the home vitamin D test kits, without study involvement, for only $65 – and this includes shipping!
The vitamin D test results are emailed directly to the you – it’s that simple! GrassrootsHealth will include additional information through a cover letter about the steps to take to optimize vitamin D levels.
Personalized Target-Based Dosing Begins with Testing
Whether you are testing through CheckYourD.org, the GrassrootsHealth D*action study, or anywhere else, we still highly encourage using our 5-Step Protocol.
- MEASURE with a vitamin D blood test [as 25(OH)D]
- CALCULATE a personalized dose with our Vitamin D*Calculator
- IMPLEMENT dosing & lifestyle changes – be consistent with daily supplementation
- RETEST in 3 to 6 months to confirm the correct dosage
- ADJUST and repeat as needed until optimal or target levels are achieved
Download our Step-by-Step Solution Guide Here.
Measuring Your Level is Important… Are You Getting Enough Vitamin D?
The only way to know is to test your levels! Testing versus blind supplementation is essential to know for sure if what you are taking is the right amount for you. Once you test your vitamin D (and other levels) to know where you are NOW, you can account for any upcoming changes in lifestyle over the coming months and adjust your intake to reach (or maintain) your targets.
Order thru CheckYourD.org (Only $65)
Measure as a Participant in the D*action Study
Are You Getting Enough Vitamin D & Other Health Boosting Nutrients?
Measuring our levels of vitamin D and other important nutrients and health markers can be considered one way to check-in with our health status and guide us towards the steps to take next in improving and supporting our health.
Having and maintaining healthy vitamin D levels and other nutrient levels can help improve your health now and for your future. Choose which to measure, such as your vitamin D, omega-3s, and essential minerals including magnesium and zinc, by creating your custom home test kit today. Take steps to improve the status of each of these measurements to benefit your overall health. You can also track your own intakes, symptoms and results to see what works best for YOU.
Enroll and test your levels today, learn what steps to take to improve your status of vitamin D (see below) and other nutrients and blood markers, and take action! By enrolling in the GrassrootsHealth projects, you are not only contributing valuable information to everyone, you are also gaining knowledge about how you could improve your own health through measuring and tracking your nutrient status, and educating yourself on how to improve it.
How Can You Use this Information for YOUR Health?
Having and maintaining healthy vitamin D and other nutrient levels can help improve your health now and for your future. Measuring is the only way to make sure you are getting enough!
STEP 1 Order your at-home blood spot test kit to measure vitamin D and other nutrients of concern to you, such as omega-3s, magnesium, essential and toxic elements (zinc, copper, selenium, lead, cadmium, mercury); include hsCRP as a marker of inflammation or HbA1c for blood sugar health
STEP 2 Answer the online questionnaire as part of the GrassrootsHealth study
STEP 3 Using our educational materials and tools (such as our dose calculators), assess your results to determine if you are in your desired target range or if actions should be taken to get there
STEP 4 After 3-6 months of implementing your changes, re-test to see if you have achieved your target level(s)
