Unfortunately I don't know. We have gotten rid of a lot of old toys and made sure our kitchen and plates are lead free and did some of that before a retest and

Unfortunately I don't know. We have gotten rid of a lot of old toys and made sure our kitchen and plates are lead free and did some of that before a retest and that may have helped some. We are going to retest now that he is older and not sticking random stuff in his mouth much. He still eats a lot of sweet potatoes and I suspect that could be a source. I also just got some of the new easy to use lead testing kits and am starting to test some things with that but everything seems to come up negative so far.