Today, we'll focus our attention on the meaning of the word "Synergy", indicating "an interaction between two (or more) different elements producing a greater effect than the sum of two elements of the same kind". A good synergy takes place when the combination of two distinct elements results in an effect more significant than the sum of its individual parts. 

You can find a great example of synergy in the combination of vitamins D3 & K2, both essential, primary, fat-soluble nutrients. While they supply a plethora of unique benefits individually, they rely on each other to work at the best of their capabilities, protecting bone and arterial health.  

The proven benefits of vitamin D3 are so many that a single blog post couldn't include all of them. Try doing an online search regarding its benefits, and you'll be overwhelmed by a landslide of thousands of positive opinions. There is no other nutrient (except for magnesium) involved in more aspects of human health than vitamin D3.

Its supplementation supports the immune system's precise utilization of calcium to optimize bone density and overall bone health, normalize blood pressure, support cardiovascular health, and more. When working alongside, vitamins K2 and D3 activate a protein named osteocalcin, whose role is to keep calcium away from the arteries and maintain the right sugars level while preventing type 2 diabetes.

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While these are the main benefits of vitamins D3 and K2, there are many others, way too many, to be listed. Everyone should take advantage of the supplementation of vitamin D3 and vitamin K2, the powerful duo for numerous areas of human health. But remember: vitamin K2 is not recommended for people on blood-thinning medications unless approved by their health care provider.


As we thoroughly explained, vitamin D3 and K2 are both essential fat-soluble nutrients, but they rely on each other to operate optimallyEnDuro D uses these synergistic effects to provide a superior formula. For immune system support, bone health, and cardiovascular health, take EnDuro D: the dynamic duo for health and well-being.


  • Vitamin D3................. 50 mcg (2,000IU)

  • Vitamin K2...........................1,680 mcg
    (Menaquinone 4 (MK-4).....1500 mcg)
    (Menaquinone 7 (MK-7).......180 mcg)

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  • D2 (ergocalciferol)


  • D3 (cholecalciferol)

Sun-derived or animal-derived (lanolin) is believed to efficiently raise bodily levels of active vitamin D better than D2.


  • K1 (phylloquinone)

It derives from plants and is the main form of vitamin K in the diet. Vitamin K1 has an absorption rate minor to 10%.

  • K2 (Menaquinone)

Found in foods containing fat and suggested to be a more absorbable form than K1. Also, it circulates in the blood longer than K1.

Note: Vitamin K2 has many menaquinones (MK) subtypes. The most beneficial ones are MK-4 and MK-7. Research on the MK-4 subtype of vitamin K2 used 1500 mcg/day. 

Studies on MK-7 used 180 mcg/ day. Also, Dr Dennis Goodman, author of "Vitamin K2: The Missing Nutrient for Heart and Bone Health", suggests a dosage between 150 to 180 mcg/day of MK-7. Small world, these are the amounts found in EnDuro D!

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Johnny Danna 12 November, 2021
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