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@fiftyseven I tested the swabs on over a dozen items, using a fresh swab each time. The only things that triggered the color change reaction were the formula and an old lead fishing weight I had in my shop (a space the nephew has never had any access to). I'm confident enough in the accuracy to...

@patrotter They're sodium rhodizonate swabs, like a 1 sided Qtip. You wet them with water, wait for them to turn orange, then dip them in/rub them on the thing you're testing. If they turn pink or red, that indicates the sample is positive for lead. I tested them on solid surfaces like plastics...

@luca The formula was coming from BJ's, Wellsley Farms is BJ's store brand generic line. The same plants manufacture all the generic brand formulas though, so it's possible it could be in other brands as well. He's been switched to whole milk since he turned 1, but he was drinking the formula...

@fiftyseven I'm not a Reddit user, it's really as simple as that. I made an account purely because reddit stopped letting me see posts without one. And I didn't leave that comment a month ago, I left it shortly before making this post when I found it while looking to see if anyone else had had...

My nephew recently had his 1 year old checkup and the doctor informed his parents that his lead levels were unacceptably high (4.4 mcg/dL) and that the health department would be called if it didn't go down by his next checkup in 3 months. I ordered a set of lead testing swabs to start testing...