A complete safety, timing, and dosage guide for combining Vitamin K (K1, K2) with Manganese — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can take Vitamin K (K1, K2) and Manganese together; they do not interact and are safe to combine.
Vitamin K (K1, K2) and Manganese together are safe, with no known interaction. These nutrients work through separate pathways—vitamin K is fat-soluble and involved in clotting, while manganese is a mineral cofactor for enzymes. You can combine them without needing to adjust your routine.
Vitamin K (both K1 and K2) is a fat-soluble vitamin absorbed in the small intestine alongside dietary fats and transported via chylomicrons to the liver. Manganese is a water-soluble trace mineral absorbed through the divalent metal transporter DMT-1 in the intestine, a pathway shared with iron and zinc but not with vitamin K. Once absorbed, vitamin K acts as a cofactor for gamma-carboxylation of clotting factors and osteocalcin, while manganese activates enzymes like superoxide dismutase and arginase. These distinct absorption routes and independent metabolic roles mean there is no competition, no receptor overlap, and no known biochemical interaction. The body also regulates manganese absorption tightly, so vitamin K does not influence its uptake or elimination.
Take vitamin K and manganese together at a main meal that includes healthy fat, such as lunch or dinner, to support vitamin K absorption and minimize any nausea from manganese. There is no need to space them—a single time of day is convenient and effective. Choose a balanced multivitamin that contains both at moderate doses, or use individual supplements as recommended. If you forget a dose, simply continue with your next scheduled dose and avoid taking two at once. For vitamin K, consistency matters most if you are on anticoagulant therapy, so take it the same time each day.
No form-specific differences meaningfully affect this pair. Vitamin K1 (phylloquinone) and K2 (menaquinones) both combine safely with any manganese salt, such as manganese gluconate, citrate, or sulfate. Different forms of manganese have slightly varied absorption rates, but this does not change the absence of interaction with vitamin K.
This pair is frequently included in bone health supplements alongside calcium and vitamin D, as well as in general multivitamins and mineral complexes.
Yes, you can take them together. They use different absorption pathways and do not interfere with each other, so a single dose at a meal is fine.
Yes, it is safe at recommended daily doses. Many multivitamins include both, and there are no known adverse effects from daily co-supplementation.
No waiting time is needed. You can take them at the same time or at different times of day—your body will absorb each normally.
No, they do not compete. Vitamin K depends on fat absorption, while manganese uses a different mineral transporter, so there is no direct interaction.
Most people can take them together safely. However, if you have liver disease, discuss manganese with your doctor, and if you take warfarin, keep your vitamin K intake consistent.
Take vitamin K with a meal that includes fat for better absorption. Manganese can also be taken with food to reduce stomach upset, but an empty stomach is fine for most people.
Reviewed by Caroline M. on January 28, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
The matrix has 86 supplements and 7310 pairwise interactions. Click any cell to see the full breakdown.