Honestly, don't worry about this. We use plenty of spices and my kid's lead level was extremely low (undetectable if I remember right). They will test your kid at some point too. This, and other potential sources, are only a problem if the test shows there's a problem.
It depends. That's only true if the levels are very high (they can chetalate but it doesn't necessarily improve IQ). I also should have clarified "other sources" to be other trace sources.
The level isn't going to be that high from spices and normal food sources (even the article says it's .1% of a child's lead exposure). Unless they're eating paint chips or around lead fumes from old cars or some other high lead source, the levels will be low. While no amount of lead is necessarily good, there are threshold levels before it truly becomes bad. It's present everywhere in trace amounts.
