I don't know - I'm the one digging around on th elead issue & it's driving me bonkers. This is the reason I'm wondering about my gas stove...can't get a straight answer from Hamilton Beach. I've been criticized, people have said, "what's a miniscule amount of lead? we've been ingesting lead for thousands of years..." but the difference is that I'm simmering stock in my slow cooker for 24+ hours at a time, multiple times a week...and eating stock in many meals a day.
SO, I'm not sure about the Vita Clay cooker. A couple of representatives have said that the lead isn't in the glaze but in the clay itself because it's naturally occurring from the earth.
I give up. Sigh.