https://www.nbcnews.com/health/health-news/heavy-metals-lead-found-many-dark-chocolate-bars-rcna163516?
Limiting daily consumption is the best way to reduce exposure.
If they're not naming the companies, they're only pretending to care and possibly just trying to influence your purchases.
The quantity is the thing that's important here, most everything has everything in it in very trace amounts. How much is there, and how does that compare to normal exposure levels?
From the article:
Overall, 43% of the products studied exceeded acceptable levels of lead and 35% exceeded cadmium levels, according to the study, which was based on a California law that sets maximum allowable dose levels for heavy metals in food. Food researchers often use the 1986 regulations, known as Prop 65, as a safety standard because the Food and Drug Administration doesn’t set limits on heavy metals in most foods, said Leigh Frame, director of integrative medicine at George Washington University School of Medicine and Health Sciences and lead author of the study.