The Food and Drug Administration’snew plan to keep high levels of lead out of baby foods like mashed sweet potatoes, apple sauce and dry cereal is part of a larger effort to eliminate heavy metals from the foods the youngest children eat.

The push follows years of studies by public health, consumer and government experts revealing concerning levels of arsenic in rice cereal and other items fed to infants, including big-name brands like Gerber and organic staples like Earth’s Best.