inorganic is toxic. we don t know from the samples which it was. reporter: abc news health and medical editor, dr. richard besser confronted dr. mehmet oz on good morning america. this fear mongering reminds me of yelling fire in a movie theater. i am very annoyed about this. i am not fear mongering, we did our home work, spent a lot of time making sure we got our numbers right. how can you go on the air and publish arsenic ruts without breaking it down into total, inorganic and organic? i disagree, rich, we looked at total arsenic levels. that s what the fda looks at. in addition your assumption that organic arsenic is safe is not true. the fda did send a letter to the oz show five days before the program warning them it would be irresponsible to air it. t.j. winick, abc news, new york. what is so fascinating the two know each other. they went to medical school together. they are both accomplished doctors.