Hi Hveragerthi, What form of Dan Shen are you referring to? Would a decoction of the root from a good supplier fit here, ie. Mountain Rose Herbs. Can you recommend a supplier or a source for whatever form you recommend? My husband is on Coumadin and has all the undesirable side effects. He is more sick by the day. Starting with Nattokinase today. I had started him on garlic. I'd so appreciate your feedback.