A new report claims most baby foods in the U.S. contains toxic heavy metals including lead, arsenic and mercury.

Healthy Babies Bright Futures, a nonprofit organization that works with other non-profit organizations and scientists, tested 168 types of baby food from 61 brand name companies.

94% of containers tested positive for lead
75% tested positive for cadmium
73% tested positive for arsenic
1/3 tested positive for mercury,
26% contained all four metals

The study also called on the US Food and Drug Administration, as well as major baby food companies, to reduce or eliminate the levels of toxic materials in baby food.

According to American Academy of Children and Adolescent Psychiatry, even small exposure to lead may cause children to be hyperactive, irritable, and inattentive. Higher levels of lead exposure may lead to learning problems, delayed growth, hearing loss, and trouble when learning to read.