I'm comparing two companies that sell Lugol's, one is through altcancer, a 7% and 15%, and the other is through J.Crow 5%. Do any of you use the altcancer product who sells through Herb Healers? Seems like you get more for the money with them. It's confusing as to which Iodine product to purchase. Sorry, serious newbie here. Also are the Lugol's and Iodoral products Kosher?