I buy powder from Alternative Herbs and the quality is impeccable. I buy tincture from Ingrid. It is called Cherokee blend. She puts galangal in it to diminish the nausea. Her products have been proven effective via darkfield microscopy.
I hear that Bloodroot is susceptible to mildew. If you notice a funny odor, throw it out. I have never seen this happen, just been told that it does.