D3 + K2

Supports immune, muscle & heart health*
60 liquid capsules · 30 day supply per bottle


D3 + K2

In recent years, the importance of vitamin D3 and vitamin K2 in supporting various aspects of health has gained significant attention. However, not all forms of these vitamins are created equal. Today, we explore the potential benefits of natural vitamin D3 derived from lichens and its synergistic effects with both forms of vitamin K2, MK-4 and MK-7.

Why Choose Natural Vitamin D3 from Lichens?

Lichens, a unique organism composed of a symbiotic relationship between a fungus and an alga, offer a natural source of vitamin D3. Unlike synthetic forms, natural vitamin D3 from lichens is chemically identical to the vitamin D3 produced by our bodies when exposed to sunlight. This similarity allows for optimal bioavailability and utilization in the body, potentially offering advantages over synthetic counterparts.

The Synergy between

Natural D3 and Vitamin K2

Vitamin D3 and vitamin K2 work synergistically to support various aspects of health. Both vitamins play prominent roles in calcium metabolism, ensuring proper distribution and utilization of calcium in the body. Natural vitamin D3 enhances calcium absorption in the intestines, while vitamin K2, particularly MK-4 and MK-7, directs calcium to the appropriate locations, such as bones and teeth.


Teeth and Bone Health:

The combination of natural vitamin D3 and vitamin K2 is essential for maintaining strong teeth and healthy bones. Vitamin D3 aids in calcium absorption, while vitamin K2 ensures that the absorbed calcium is properly utilized and directed to the bones and teeth, where it is needed. MK-4, with its shorter chain, has been shown to stimulate osteoblasts, promoting bone formation.

Immune and Brain Health:

Both vitamin D3 and vitamin K2 play crucial roles in supporting immune and brain health. Vitamin D3 helps regulate immune cell function and promotes a balanced immune response. Vitamin K2, particularly MK-7, supports immune cell activity and modulates inflammation. Additionally, emerging research suggests that vitamin K2, including MK-4, may contribute to brain health by protecting brain cells and supporting cognitive function.

Distinct Differences between MK-4 and MK-7

While both MK-4 and MK-7 are forms of vitamin K2, they have some distinct differences in potential benefits. MK-4, with its shorter chain, is readily absorbed and utilized by the body, playing a role in bone formation. On the other hand, MK-7, with its longer half-life, provides sustained benefits and is particularly effective in preventing arterial calcification, supporting cardiovascular health.

"This formula is very exciting and represents MD Logic Health's commitment to improvement. This pure blend has clinically meaningful levels of Natural Vitamin D3, along with both forms of vitamin K2 both M7 and MK4 without any harsh fillers or additives. This natural D3 provides the same form of vitamin D3 created by our bodies when exposed to sunlight. This similarity allows for optimal bioavailability and utilization in the body, potentially offering advantages over synthetic counterparts. This is a form of D3 and K2 that I feel confident to recommend to my patients, friends, and family. I am excited to see MD Logic Health continue to raise the bar on excellence in nutraceuticals."
— Dr. Roxanne Carfora, Board Certified Functional Medicine Physician.

Recommended Use

As a dietary supplement, take 1 to 2 capsules daily, preferably with a meal, or as recommended by a health care professional.


Keep out of reach of children and pets. Consult with a qualified healthcare professional prior to using this product, especially if you are pregnant, nursing, have a medical condition, or are taking prescription medications. Do not exceed recommended daily intake. Discontinue use if any adverse reactions occur and contact a healthcare professional. Do not use if the seal under the cap is broken or missing. Store tightly closed in a cool, dry place.


*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Customer Reviews

Based on 3 reviews
Catluvr93 (Palatine, IL)
Love MD Logics meticulous attention to quality

I’ve liked all of the MD Logic products I have tried. I’ve also used most of the Melanie Avalon products, as well as a couple of the Cynthia Thurlow products also. I trust all products that are made by MD logic to have the highest quality ingredients with no junk additives or fillers. The only problem I have is that I really can’t afford too many, so I have to pick and choose and cycle on and off with some of them, to help make taking high quality supplements a little more doable with my budget, and even then, it’s still quite high. I will only buy when there is some kind of discount offered.

Tameka W. (Portland, OR)
The best!

Amazing product! I love it!

Stephanie S. (New York, NY)
Sleeping better

I do believe this with some other supplements help me sleep better at night. I also take GABA and started taking my progesterone at night.