5 Supplements That May Make Medication Less Effective Some supplements can interact with certain medications and reduce their effectiveness.Top offenders include calcium, magnesium, iron, fiber, activated charcoal and vitamins C and K. If you take supplements, talk to your health care provider to make sure they are safe for you. If you’re looking to… #dining #cooking #diet #food #Nutrition #nutrition https://www.diningandcooking.com/2464292/5-supplements-that-may-make-medication-less-effective/ https://media.vive.im/media_attachments/files/115/876/962/700/640/090/original/15c4aa284715db81.jpg