Calcium & Vitamin K

topic

Calcium is the most abundant mineral in the body, comprising approximately 99% of bone and teeth mineral content and serving critical roles in nerve signal transmission, muscle contraction, blood coagulation, and enzyme activation. Its absorption and utilization are inseparable from vitamin D and vitamin K2 (menaquinone) — with vitamin D facilitating calcium absorption from the gut and vitamin K2 directing absorbed calcium to bone and away from arterial walls, making the calcium-D-K2 axis the complete functional system for bone health and cardiovascular protection from calcification.

Role

The calcium supplementation story is one of the most instructive examples of nutrition science's tendency to identify a single nutrient deficiency and recommend supplementation without understanding the broader nutrient interaction context — producing the paradox of calcium supplements associated with increased cardiovascular risk (arterial calcification) in women who lack adequate vitamin K2 to direct the calcium to bone. The majority of people supplementing calcium for bone health have never been told about vitamin K2, creating a situation where the supplement intended to protect their bones may be calcifying their arteries. Understanding the calcium-D-K2 system rather than calcium alone represents the difference between educated supplementation and potentially harmful nutritional over-simplification.

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