guidance. we need them to set some limits and say this is the line and you have to come in under this line. >> reporter: nature's one, the company that makes that toddler formula, said their testing showed undetectable levels of arsenic within their laboratory's testing limits. dr. richard besser, abc news, new york. >> and brown rice they say is so much better than white rice. so what you should do, dr. besser says, is to wash, rinse off your brown rice to get rid of some of the arsenic that's in there. but if you're an adult you should be generally okay like you heard in the piece. >> typically, if you look at the package instructions -- i cook rice quite often. and it tells you even if it's white rice to rinse it off because you never know what's on it. >> i don't worry about that because -- >> you just order in, so it doesn't matter, right? >> yeah, that's true. >> caught you. >> busted. the fda is warning everybody now about a hazardous motorized toothbrush that actually can cause some pretty serious injuries. it is called the spin brush. you give your kids this, right? it's marketed under the crest as well as the arm & hammer brands. the fda has had complaints about that spinning brush literally