The study, conducted by researchers from The George Washington University School of Medicine and Health Sciences and ConsumerLab.com, analyzed 72 dark chocolate and cocoa products sold in the United States from 2014 to 2022. Their findings shed light on a potential health concern that has been bubbling beneath the surface of the chocolate industry for years.

Why Study Heavy Metals in Chocolate?

Dark chocolate, long touted for its potential health benefits due to its high antioxidant content, has faced scrutiny in recent years due to reports of heavy metal contamination. Consumer media outlets and independent testing agencies, including Consumer Reports and As You Sow, have previously highlighted this issue.

Consumer Reports found heavy metals in popular chocolate brands including Hershey's, Theo, Trader Joe's, Godiva, Hu, and Equal Exchange, according to their 2022 report. A report by As You Sow also revealed elevated heavy metals in various chocolate products tested between 2014 and 2017. These earlier reports raised concerns about the safety of dark chocolate consumption, particularly for vulnerable populations such as children and pregnant women.

Given these concerns, Leigh Frame, director of integrative medicine at George Washington University and co-lead of the study, aimed to explore the significance of this contamination.

"We know chocolate is a plant that is particularly good at absorbing heavy metals from the soil and is grown in areas where there are heavy metals in the soil. So, it seemed like a logical area of concern. Also, often people think of chocolate as a supplement—like I'm getting my daily dose of chocolate because it's good for me, right?  We were interested to see if people consuming chocolate for health benefits really do get those benefits because there is also potentially heavy metal exposure," Frame told The Epoch Times in an interview.