D3 + K2

$46.34
Supports immune, muscle & heart health*
60 liquid capsules · 30 day supply per bottle

Supply
About

D3 + K2

Unlock the power of the "Sunshine Vitamin" without the sun damage. D3+K2 delivers a premium, vegan-friendly Vitamin D3 derived from Lichen, paired with a dual-action Vitamin K2 complex (MK-4 & MK-7). Delivered in a liquid capsule for optimal absorption, this formula ensures calcium goes exactly where it belongs: into your bones and teeth, not your arteries.

Key Benefits

Supports Strong Bones & Teeth

By optimizing calcium utilization, D3+K2 promotes healthy teeth, and bone mineralization and density, helping to maintain a strong teeth and skeletal structure as you age.*

Promotes Cardiovascular Health

Vitamin K2 helps prevent calcium deposits in the arteries (calcification), promoting flexible, healthy blood vessels and overall heart function.*

Immune System Support

Vitamin D3 is a critical modulator of the immune system. Maintaining healthy levels is essential for a robust immune response against seasonal challenges.*

Mood & Cognitive Support

Adequate Vitamin D levels are linked to healthy mood regulation and cognitive function. Emerging research also suggests that Vitamin K2, specifically the MK-4 form found in our formula, may help protect brain cells and support cognitive function.*

Why "Dual" K2 Matters (MK-4 + MK-7)

Most supplements only offer MK-7. We believe in complete coverage.

Long-Acting

MK-7 (Menaquinone-7)

MK-7 is the only compound proven to impact arterial calcification. Its extended half-life ensures sustained support for flexible, healthy arteries.*

Both
Fast-Acting

MK-4 (Menaquinone-4)

This shorter-chain form is rapidly utilized by specific tissues, playing a crucial role in stimulating bone formation and supporting brain health.*

Pure, Plant-Based Potency

While many Vitamin D3 supplements are derived from lanolin (sheep's wool grease), we source ours from Lichens, a unique symbiotic plant species. This ensures a clean, sustainable, and chemically identical form of D3 that is vegan-friendly and highly bioavailable.

100% plant-derived from sustainable lichens

Vegan-friendly and cruelty-free

Chemically identical to traditional D3 for optimal absorption

"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.

Warnings

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.

Disclaimer

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

Customers praised this vitamin D3 and K2 supplement for significantly boosting D3 levels, with one noting an increase "from 27 to 49 in 6 months." Shoppers reported improved sleep, reduced muscle pain, stronger nails, and easy stomach tolerance. The main concern was affordability, with some needing to cycle supplements due to budget constraints.

  • 5 stars: 7 (88%)
  • 4 stars: 1 (13%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
g
grace h. (Brooklyn, NY)
THIS IS YOUR SIGN!

The perfect addition to my routine because the winter months are coming up and I don't want my vitamin D levels to bottom out :)

P
Praimwattie B. (South Plainfield, NJ)
1 bottle
Super mood boost!

Greatly increased my D3 levels. Took on recommendation of my doctor and my blood work results are perfect!

M
Mary W. (Abingdon, VA)
3 bottles
The BEST Vit D!!

Prior to trying the Vit D/K2 from MD Logic I had taken two other very high quality Vit D/K2 supplements each for 6 months faithfully and each with very little change. With MD Logics my Vit D increased from 27 to 49 in 6 months! Way more than it had with either of the other two brands! I also appreciate that I can take on an empty stomach with my magnesium and neither upset my stomach at all.

M
Marilyn M. (Cincinnati, OH)
1 bottle
I am taking to help calcium protection

I have had osteopenia for 20 years plus. I have been taking recommended dose of calcium and vitamin D with no advancement of osteopenia. However, no improvement. I have been taking K3/K2 for about a year. No side effects noted and my blood panels normal. I immediately noted an improvement in my nails. I am not due for dexoscan until next year. I am hopeful that this addition to my routine is making a difference.

L
Leticia g. (Coral Springs, FL)
1 bottle
Love it

I’ve been taking this vitamin for a few months and I noticed less muscle pain when I workout. I love it!!!

S
Stacie K. (Palatine, IL)
1 bottle
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.

T
Tameka W. (Portland, OR)
3 bottles
The best!

Amazing product! I love it!

S
Stephanie S. (New York, NY)
3 bottles
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.