Vitamin K matters for blood clotting. That does not mean every D3 product needs K2 or that K2 prevents vascular calcification.
What was studied
A randomized trial in 365 men with aortic valve calcification found no significant effect of MK-7 plus vitamin D on calcification progression after two years.
What remains uncertain
A biomarker is not proof of fewer heart attacks. Patient-group findings do not generalize to everyone. Vitamin K interacts with vitamin K antagonists such as warfarin.
Oil weight is not active content: check EPA and DHA separately. Algal oil can be a vegan source; the actual composition matters.
What was studied
VITAL tested 1 g marine omega-3 daily in 25,871 older adults. The primary combined cardiovascular endpoint was not significantly reduced.
What remains uncertain
The trial tested an EPA/DHA mixture, not this nutrient alone or an algal-oil product. Prescription trials do not establish benefits for arbitrary supplements. EFSA has not established a UL; an assessed safe intake is not an upper limit or personal recommendation.
Oil weight is not active content: check EPA and DHA separately. Algal oil can be a vegan source; the actual composition matters.
What was studied
VITAL tested 1 g marine omega-3 daily in 25,871 older adults. The primary combined cardiovascular endpoint was not significantly reduced.
What remains uncertain
The trial tested an EPA/DHA mixture, not this nutrient alone or an algal-oil product. Prescription trials do not establish benefits for arbitrary supplements. EFSA has not established a UL; an assessed safe intake is not an upper limit or personal recommendation.