This combination works synergistically to support skeletal and cardiovascular health. Vitamin D3 enhances the body's ability to absorb calcium from the gut, while Vitamin K2 helps direct that calcium into bones and teeth, preventing its deposition in arteries and other soft tissues. This dual action is critical for maintaining bone mineral density and vascular flexibility, two key components of healthspan.
Verdict
A key combo for bone health; get calcium from diet first.
HEALTHSPAN IMPACT
Moderate
RISK LEVEL
Low
EVIDENCE GRADE
A
MONTHLY COST
$5 - $15
Protocol
- Take 2000-5000 IU of Vitamin D3 daily, ideally with a fatty meal to improve absorption.
- Combine with 100-200 mcg of Vitamin K2, typically in the MK-7 form, taken daily.
- Calcium supplementation is only recommended to offset a documented dietary shortfall, not in addition to a calcium-rich diet.
Flags
- Excessive calcium supplementation, particularly without K2, is linked to increased risk of arterial calcification and kidney stones.
- Vitamin K2 can interfere with anticoagulant drugs like Warfarin (Coumadin).
- High-dose Vitamin D supplementation without monitoring can lead to toxicity (hypercalcemia).
- Prioritizing dietary calcium from sources like dairy, leafy greens, and sardines is generally considered safer than supplementation.