Vitamin D & Omega-3 Index Test Kit

$119.00 available on subscription from $114 every 3 months

Check your Omega-3 and vitamin D levels.

Choose a subscription plan

SKU: GRH-TSTDO3-SNGL Categories: , ,
Included in each Vitamin D*action Omega-3 test kit:

  • 3 lancets
  • 1 Vitamin D blood spot card
  • 1 Omega 3-Index blood spot card
  • 1 envelope for returning both cards
  • 1 gauze pad, 2 band aids, and 1 alcohol swab
  • Vitamin D literature

EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) are two very important omega-3 fatty acids found in fatty fish and other marine sources, which are essential to our health. The Omega-3 Index is a measure of the amount of EPA and DHA in red blood cell membranes. The result is expressed as a percent of total RBC fatty acids, and is a long-term and stable marker of omega-3 status throughout the blood and tissues.

A higher Omega-3 Index has been associated with improved cognitive function and cardiovascular health, lower risk of dementia, lower risk of cancer, longer life, and a reduced relative risk for death from any cause, including COVID-19. Omega-3s are beneficial for normal vision, anti-aging, skin health, maternal health, immune function, brain health, heart health, normal liver function, joints and muscles, and more.

Experts recommend an Omega-3 Index of at least 8%; while individual levels of omega-3s vary across the globe, most countries and regions have levels that are considered low to very low. An analysis of the GrassrootsHealth cohort showed that 82% of participants had an Omega-3 Index below 8%, however, among those who completed two or more tests, 71% of those with an Omega-3 Index less than 8% increased their index after their first test. Take advantage of this opportunity to improve your Omega-3 Index!  Once you have your Omega-3 Index result, use the Omega-3 Index Calculator to determine an approximate additional DHA and EPA intake to help achieve your target index.

Learn more about the importance of measuring your Omega-3 Index and research involving the Omega-3 Index.

Enrollment with the purchase of a Vitamin D*action blood spot test kit includes:

  • 2-3 lancets
  • Blood spot card(s) for the tests ordered
  • 1 envelope for returning your blood spot card
  • 1 gauze pad, 1 band aid, and 1 alcohol swab
  • Vitamin D*action literature

When you order your kit, you will also be participating as a citizen scientist in the world’s largest vitamin D project to solve the deficiency, D*action. You may choose to enroll for a 1-time test with your health information, or you may even participate in the 5-year project, where you provide your health information along with a vitamin D test every 6 months for the 5-year period. Your participation over the next five years will help build a body of science that will allow for tracking health care outcomes associated with vitamin D levels, and other important nutrients.

Questionnaire & Citizen Science

Becoming a participant of GrassrootsHealth means that you are joining thousands of people in collaborating with us on nutrient research. Citizen science welcomes everyone’s participation in the discovery and sharing of scientific knowledge. As a citizen scientist, you can help everyone gain a better understanding of the role of nutrients in health and disease, and use the results to help inform public health officials to create change. Additionally, you can use your results to make informed decisions about nutrients that affect your health.Here’s to the power of citizen science!

GrassrootsHealth could provide testing without asking you to fill out a questionnaire, but without that data we would have no way of measuring an effect. It would be a public service, especially back in 2009 when we started and it was hard to get a doctor to order a vitamin D test. But we founded GrassrootsHealth for more than testing. We founded GrassrootsHealth based on science, by first gathering together over 40 vitamin D researchers to form a panel of experts, then having those researchers come to a consensus on what the optimal vitamin D blood levels should be for general good health. The consensus they reached was for vitamin D levels to be in the range of 40-60 ng/ml (100-150 nmol/L). By asking about health, nutrient supplementation, and other exposures we can connect each participant’s blood levels with their lifestyle and health status and help guide scientific answers to personal questions. In short, your data matters!

Learn more about the importance of the questionnaire.

Your individual health data will be kept confidential except for where required by law. The accumulated data will be stored in a secured, encrypted database operating behind a firewall, and password protected. The only person that will have access to the identified data will be our primary data biostatistician. This will be for purposes of accessing hospital records as indicated and released by participants, or for clarification of entries in the health questionnaire. The de-identified health information is shared so the research can be conducted, properly monitored and published. The Principal Investigator and other researchers will access the data in a de-identified form. For all analyses only an arbitrary number will identify the participant.
Vitamin D3 (cholecalciferol) is a prohormone produced endogenously from the action of ultraviolet light on its precursor, 7-dehydrocholesterol, in the skin, and is also commonly found in over-the-counter vitamin D supplements. Vitamin D2 (ergocalciferol) does not occur naturally, but is manufactured commercially by exposing ergosterol to ultraviolet light, and is the predominant form obtained by prescription in the US. Both are hydroxylated in the liver to form their 25-hydroxy metabolites (25(OH)D2 and 25(OH)D3), the major circulating form of vitamin D in the blood and the commonly accepted measure of vitamin D status. The blood spot assay is performed using liquid chromatography/ tandem mass spectrometry (LC-MS/MS), the same method used by the CDC Nutrition Laboratory to obtain accurate 25(OH) D values. Method accuracy is ensured by standardization with the NIST vitamin D standard reference materials. Circulating 25(OH)D3 levels reflect endogenous production as well as vitamin supplementation, whereas 25(OH)D2 levels reflect the results of Vitamin D2 supplementation. Vitamin D2 is believed to be less bioactive than vitamin D3. Vitamin D deficiency is linked with many chronic diseases, including autoimmune diseases, diabetes, cardiovascular disease, and cancer. Optimal levels of 25(OH)D3 are 32—100 ng/mL.