Vitamin D3 + K2 and Blood Spot Test

Every Cell in Your Body Has a Vitamin D Receptor

That means every cell in your body needs vitamin D

Do you know what your vitamin D level is?

You can test it yourself— at HOME.

GS Vitamin D3 Plus K2

Knowing your vitamin D
level is Important
Check it yourself with the
Doctor’s Data (at HOME)
Vitamin D Blood Spot Test

Every Cell in Your Body Has a Vitamin D Receptor

That means every cell in your body requires vitamin D

That’s why it’s called ‘the sunshine vitamin’, it brings life to every cell in your body
So if you have low Vitamin D levels, what cell may not function correctly?
Every cell! Any cell!
That’s why Vitamin D is the most important of all nutrients for the body because every cell needs it.

Why Take Vitamin D3 Plus K2?

GS Vitamin D3 + K2
Price $ 31.90
Immune & Bone Support*

GS Vitamin D3 + K2 is a soy-free, natural vitamin D3 and vitamin K2 in a water-soluble micellized form. Micellization greatly increases the solubility, absorption and bioavailability over oil or emulsified forms.*

This formula includes the patented vitaMK7, a natural vitamin K2 (as MK7) which supports enhanced utilization of calcium in the bloodstream.* It is an all-trans natural menaquinone-7 with the highest bioavailability and longest half-life in the blood.* VitaMK7® is shown in human clinical studies to increase osteocalcin (calcium-binding protein) levels, enhancing the body’s ability to utilize calcium in the bloodstream.* It is also shown to prevent bone loss and promote bone integrity while significantly reducing the incidence of arterial calcification, promoting optimal cardiovascular function.* An in-vitro study shows vitaMK7® inhibits the production of PGE-2, a prostaglandin that acts as a potent stimulator of bone loss.*

It is non-GMO and solvent free and processed under the strictest purity standards.

Vitamin D Blood Spot (at HOME) Test

Price $70.00

The at home Vitamin D Blood Spot Test is a finger prick blood spot test. The blood spot specimen is easliy collected at home and sent directly to Doctor’s Data Laboratories.

25-Hydroxyvitamin D, known for its role in bone health and calcium absorption, also appears to affect immune function, neurodegenerative and cardiovascular issues, and other conditions. Vitamin Doccurs in two forms—D3 is obtained from animal diet sources and through sun exposure, and D2 is obtained through vegetable diet sources. Both forms of the vitamin are used to fortify various foods and in supplements.



25-Hydroxyvitamin D Total
25-Hydroxyvitamin D2
25-Hydroxyvitamin D3

This test is useful for

Alzheimer’s Disease
Bone Health
Calcium Absorption
Cardiovascular Disease
Immune Function
Multiple Sclerosis
Neurocognitive Dysfunction
Rheumatoid Arthritis
Type 2 Diabetes

Detailed Information

25-Hydroxyvitamin D is the major circulating form of vitamin D. It occurs in two forms: vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol), and is the precursor of the active form (1,25-dihydroxyvitamin D). Because of its long half-life, measurement of total 25-Hydroxyvitamin D (D2 plus D3) provides the best assessment of patient vitamin D status and includes vitamin D derived from diet, supplements and exposure to UVB light, such as sunlight. Vitamin D is best known for its role in calcium and bone metabolism, but emerging research indicates that low levels of vitamin D may be associated with increased risk of some cancers, type 2 diabetes, multiple sclerosis, cardiovascular disease, rheumatoid arthritis, depression, Alzheimer’s disease, infections, preeclampsia, cesarean deliveries and neurocognitive dysfunction. Vitamin D regulates the expression of a vast array of genes in tissues including immune cells, the vasculature, muscle and reproductive organs. Vitamin D insufficiency is common and deficiency can have adverse health effects at any stage of life. Many testing methods do not differentiate between the two forms of vitamin D, and only total concentrations are reported. This LC/MS QQQ method is sensitive and specific for both vitamin D2 and D3, and each form is measured and reported independently.

You also have the option of scheduling a test interpretation consultation with one of our Consultants Consultation charges are based on the amount of time. We recommend scheduling a 15-minute test interpretation consultation.

*Please Note:

  • Price includes collection kit and second day FedEx return shipping for US orders
  • There is a $55 additional drop ship charge on all International orders.
  • We are unable to ship test kits to New York.
  • We are unable to ship lab kits to PO boxes. Please use a residential or business address.
  • There is an additional drop ship charge on all International orders.
  • These tests are not available in Iran, North Korea, Cuba, Russia or Ukraine.

Please allow 7-10 business days for delivery

These statements have not been evaluated by the Food and Drug Administration.
These products are not intended to diagnose, treat, cure or prevent any disease.