Published on November 21, 2025
Save or donate with a chance to WIN while supporting GrassrootsHealth!
GrassrootsHealth is incredibly thankful to everyone who supports us. That is why we wanted to share a chance for anyone who supports us through their purchase or donation this Thanksgiving week to benefit in some additional and fun way…
Today through Monday, December 1st 2025, anyone who purchases a home test kit or who donates $20 or more will be entered to win a FREE family 4-pack of vitamin D test kits (a value of $300)!
PLUS, when using the code HOLIDAY20, you will SAVE 20% on any order $100 or more.
Not sure which tests are right for you? Did you know you can customize your Vitamin D*action participation kit by adding tests for more health insights? Learn more about each of the testing options available to you.
This offer is only available through Monday, December 1st, 2025 at 11:59PM PST.*.
(Offer not valid on the T1D Prevention Test Kit)
GET YOUR TEST KIT NOW!
WHY SHOULD YOU TEST TODAY?
Your health must rely on a single matter: your actions. These actions include the nutrients you take, how often you take them, and how well your body is absorbing them. How do you know if they are working for you, and how do you keep track?
The answer: measure your nutrient levels until you have achieved your target, and know what you need to do and doses to take to maintain those levels. This is important to improving your health now and for your future.
Don’t bet on your health, take action NOW!
Nearly 20,000 participants have taken action by measuring their vitamin D level and joining as a Citizen Scientist in the vitamin D*action study. You can too! Measure any combination of the following along with your vitamin D:
- Omega-3 Index, including AA:EPA and Omega-3/6 Ratios – measure your omega-3 levels with the Omega-3 Index; get additional insights on the balance of essential fats in the body and how they may be contributing to inflammation and disease by adding the ratios
- High Sensitivity C-Reactive Protein (hs-CRP) – a marker of inflammation in the body
- HbA1c (Glycated hemoglobin) – measures the health of recent blood sugar levels
- Magnesium, with additional elements such as Selenium, Zinc, Copper, Zinc:Copper Ratio and toxic elements Cadmium, Lead, and Mercury
- Thyroid Stimulating Hormone (TSH)
- Type 1 Diabetes Autoantibodies (T1D AABs) – T1D islet cell autoantibody detection indicates an autoimmune response against the cells of the pancreas and can be used as markers of the process that can cause type 1 diabetes
Learn More about Your Test Options Here
Build your custom kit by adding your choice of the options above, or choose from our top selling test combinations:
Inflammation Panel | Vitamin D & Omega-3 Index | Immune Boost Panel |
|---|---|---|
 |  |  |
ENSURE HEALTHY LEVELS BY TESTING TODAY
Having and maintaining healthy nutrient levels can help improve your health now and for your future. Choose which nutrients to measure with your vitamin D, such as your omega-3s and essential minerals including magnesium and zinc, by creating your custom home test kit today with our special offer. Take steps to improve the status of each of these measurements to benefit your overall health. With measurement you can then determine how much is needed and steps to achieve your goals. You can also track your own intakes, symptoms and results to see what works best for YOU.
*Offer valid until Monday, Dec 1st, 2025 at 11.59PM PST. Valid on all at-home test kits from GrassrootsHealth except the T1D Prevention test kit; enrollment included. Not cumulative with other coupon codes.
Take steps for your own health to ensure optimal vitamin D levels – for your family and loved ones as well – by measuring at home today.
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)
