How to Use D3 and K2 to Heal Arteries
In a Nutshell
Take vitamin D3 only as needed to reach blood levels of 50-90 ng/mL, typically 2,000-5,000 IU daily, and never exceed 90 ng/mL. Take at least 400 mcg of K2 daily as separate supplements rather than combination pills, since K2 primarily works by improving insulin resistance rather than removing calcium from arteries. Standard combination pills force excessive D3 dosing to reach effective K2 amounts and can cause kidney damage even with magnesium supplementation.
These notes were generated by AI and may contain inaccuracies.
Vitamin D3 and K2 are two of the most important supplements available. There is clear evidence that they help arteries by preventing dangerous arterial plaque buildup. Most people take them incorrectly, which can result in healthier arteries versus wasted money or actual body damage. Some people have died from taking these supplements incorrectly in wrong doses.
The most purchased D3 and K2 combination pill provides 90 micrograms of K2 and 5,000 international units of D3. To reach a K2 dose that has been studied and shown to work, four of those pills would be needed. This results in 20,000 international units of D3 daily, which is not recommended. Taking magnesium with high D3 doses does not prevent problems, as multiple patients have experienced kidney function issues and kidney damage despite magnesium supplementation. A doctor reported a patient who died from taking higher D3 doses.
A study following men over time found that those with vitamin D3 levels below 30 had higher heart attack risk than those at 30 or above. Men with levels below 15 had 2.5 times higher risk. Men with levels between 22 to 30 still had about 60% more risk for heart attack, despite most labs considering this range acceptable.
The VITAL trial with 25,871 people tested 2,000 international units of D3 daily versus placebo over a median of 5.3 years. The D3 group showed no significant reduction in cardiovascular events. This result occurred because most participants were not deficient initially, and a fixed dose was given without measuring actual D3 levels achieved.
Vitamin D3 deficiency commonly occurs alongside obesity, inactivity, poor lifestyle, fatty liver, prediabetes, and diabetes. These associated conditions also track with heart disease and heart attacks.
A 52-year-old active patient named Arnold ate well and was taking a combination D3 and K2 pill plus a multivitamin containing additional D3, totaling over 10,000 international units of D3 daily. His routine checkups never tested vitamin D levels. When tested, his blood calcium was climbing and kidney function had declined, showing kidney injury. He had been taking magnesium the entire time, which did not prevent calcium absorption issues or kidney damage.
Above 100 ng per ml, no additional benefit is observed, but documented risks appear. The target vitamin D level should be between 50 and 90 nanograms per milliliter. Supplement only as much as needed to reach this range, which for most people means 2,000 to 5,000 international units daily. A few individuals may need up to 10,000 international units. Factors affecting dosing include body fat, latitude, sun exposure, skin tone, and absorption ability.
K2 activates matrix GLA protein, which governs calcium placement in the body. The AVIDEC trial tested MK7 at 720 micrograms daily in older men with aortic valve calcium buildup. Results showed no significant effect on coronary calcium progression overall, though a pre-planned subgroup with very high initial calcium showed less progression.
The VIT K2 CAC trial involved 167 people with existing heart disease, most on statins, receiving 360 micrograms of MK7 without D3 for 2 years. The placebo group's calcium score increased from 145 to 214, while the K2 group's score increased from 135 to 184, representing approximately 30% less buildup.
The traditional 90 micrograms of K2 found in most pills is insufficient for benefit. High calcium scores do not necessarily indicate higher risk, as calcium represents scarring of arterial plaque that has healed. Three substances stabilize dangerous, soft, inflamed plaque: collagen, smooth muscle cells reinforcing collagen, and calcium as the final scar. High calcium scores can indicate lower risk than soft, inflamed plaque when metabolic disease has been addressed.
Across trials, K2's strongest signal is not arterial but metabolic. A study gave MK-7 at 360 micrograms daily to people with type 2 diabetes for 12 weeks. Compared to placebo, fasting glucose and A1C decreased without requiring D3. Meta-analysis of randomized trials shows consistent modest improvement in insulin resistance, with K2 showing stronger effects than K1.
Refined and complex carbohydrates cause repeated glucose spikes that trigger insulin floods, damaging the smooth inner arterial lining where soft, non-calcified plaque forms. K2 appears to work upstream on insulin resistance before arterial damage occurs.
Fasting glucose and A1C, recommended by the ADA, miss over half of prediabetes cases. HOMA-IR, based on fasting glucose and insulin, can appear perfect even in patients with full diabetes. Post-meal glucose, oral glucose tolerance tests, continuous glucose monitoring, and LPIR scores detect damage earlier than fasting markers.
Singh and Associates found that only 5% of people with prediabetes in the United States receive diagnosis, treatment, and documentation in medical charts.
The recommended K2 dose is at least 400 micrograms daily. For osteoporosis, doses increase significantly to 45 milligrams, which is 50 to 150 times higher than standard dosing. K2's primary work occurs upstream of arteries through metabolic effects rather than direct calcium removal from arteries.
Vitamin D3 should be titrated to achieve blood levels between 50 and 70 nanograms per milliliter, not exceeding 90. Most people require 2,000 to 10,000 international units daily, typically 2,000 to 8,000. K2 requires at least 400 micrograms daily. No evidence supports specific D3 to K2 ratios. These supplements are additions to, not replacements for, lifestyle interventions.
Combination pills typically contain only 90-100 micrograms of K2, forcing excessive D3 intake to achieve adequate K2 dosing. Separate supplementation allows proper dosing of each vitamin independently. For patients on warfarin or other vitamin K antagonists, consult prescribing physicians before starting K2 due to potential effects on anticoagulation.
Calcium scores only detect hard calcium and miss inflammation, soft plaque, and cap thickness that determine actual risk. CTA with AI provides state-of-the-art assessment of arterial wall contents. CIMT offers radiation-free, less expensive alternative but is harder to access.
Keep Dr. Ford Brewer MD MPH in your library
Save the videos and channels worth coming back to, and find them again in one place.
