The Clean Label Project, a nonprofit group that focuses on transparency in product labeling, conducted the study.
Another finding was that 36 per cent of baby food samples had detectable levels of lead.
Arsenic and lead were found in infant and baby formulas a study found Wednesday. All we know at this point is that some products tested positive for the above-mentioned chemicals.
The study also found more than half of the products tested also contained cadmium, a metal found in batteries.
A new report has been released on what risky chemicals may be inside baby foods and infant formulas. The toxin is associated with developmental defects, cardiovascular disease, neurotoxicity, diabetes and even cancer, according to the World Health Organization.
The non-profit organization tested top-selling formulas and a number of national brands over five months.
A list of the all the products tested and their ratings can be found on the Clean Label project website. While most samples contained only trace amounts of the toxins, some exceeded the US Food and Drug Administration (FDA) recommendations by up to six times.
Arsenic and cadmium are naturally occurring elements found in soil, water and air, so it is not surprising that they are found in food.
Five-hundred baby food products were tested.
According to environmental protection agency, low levels of lead in children's blood have been connected to lower IQs, slowed growth, behavioral problems, hearing issues and anemia.
She hopes the results of this alarming study will prompt parents to be stronger advocates for more transparent food labeling and their children's health.
And, according to the data from the Clean Label Project, there are other chemicals in foods that parents need to be aware of.
"The baby industry needs to do a better job in protecting America's most vulnerable population", Bowen said.