How much lead is in your diet? What to know about reducing exposure

From cinnamon to protein powders , reports about high levels of lead in our food are raising questions about how to reduce exposure.

This week, a Consumer Reports investigation found some protein powders and shakes contain unsafe levels of lead. The Food and Drug Administration also recently identified four additional makers of ground cinnamon that contain elevated levels of lead, making a total of 16 labels the agency has identified as having concerning amounts of lead.

Though lead is a naturally occurring metal, it can cause negative health effects, experts warn.

"There's lead in the normal environment, that's why we don't want to add more to it," Pieter Cohen, an associate professor at Harvard Medical School and a general internist at Cambridge Health Alliance, told CBS