Add your supplements, foods, meals — and any medications you take — to see how they interact. Findings are grouped by severity: what to avoid, what needs care or timing, and what actually works better together.
Vitamin K2 counteracts warfarin and can reduce its anticoagulant effect.
Why: Vitamin K regenerates clotting factors warfarin suppresses.
→ Only under prescriber guidance with INR monitoring.
Potassium supplements with these drugs can cause dangerously high potassium.
Why: These drugs reduce potassium excretion.
→ Only supplement potassium under prescriber guidance with labs.
Vitamin D: Glucocorticoids (reduced vitamin D effectiveness)
Vitamin D: Anticonvulsants like phenytoin (increased vitamin D metabolism)
Vitamin D: Orlistat (reduced fat-soluble vitamin absorption)
Copper: Penicillamine, zinc, antacids reduce absorption
Vitamin K2: Warfarin and other coumarin anticoagulants—may reduce anticoagulant effect; consistency is key
Vitamin K2: Some antibiotics (broad-spectrum) may reduce K2 production by gut bacteria
Magnesium can bind these drugs and reduce their absorption.
Why: Cation chelation in the gut.
→ Separate magnesium from these medications by 2–4 hours.
Calcium can bind these drugs and reduce their absorption.
Why: Cation chelation in the gut.
→ Separate calcium from these medications by 2–4 hours.
Vitamin D: Magnesium (needed for vitamin D metabolism)
Vitamin D: K2 (complementary for bone and cardiovascular health)
Silica (Silicon) pairs well with Vitamin C.
