Research indicates that lead and cadmium get into cocoa in different ways. For cadmium, it appears that the cocoa plant takes it up from the soil. Lead, however, can be deposited on the cocoa beans after harvest, potentially from dust and soil as beans dry outdoors.
Sounds like this potentially affects nearly all chocolate.
Sounds like this potentially affects nearly all chocolate.
Looking at the data provided though, Walmart great value hot chocolate mix is especially egregious.