I'd go further and say you that, if you're on medication, you shouldn't take any supplements without first checking with your doctor. With regards to vitamin K

I'd go further and say you that, if you're on medication, you shouldn't take any supplements without first checking with your doctor. With regards to vitamin K, all the versions of the supplement I've seen have a specific warning on the bottle that they're not to be used if you're also taking anticoagulants.