Are there heavy metals in the Trace Minerals supplement that I should be concerned about? There are heavy metals in almost everything including Trace Minerals because they naturally occur in the soil. There are heavy metals in the foods you eat and if it’s commercially grown, then there may also be toxic heavy metals accumulated from pesticide residues. Inorganic arsenic, lead and other heavy metals are used in pesticides, fungicides and herbicides. The question is, are the naturally occurring heavy metals that are bound with plant proteins toxic? Evidence suggests they are not; however, we are not aware of any studies on this, so we can’t say with certainty. What we can say is that we have been safely using our trace minerals since the 1980s.