How much selenium will impact Heavy Metals results?

The more high selenium foods are consumed, the more likely falsely lowered Heavy Metals results. The exact amount of selenium that may interfere with heavy metal binding is unknown, and future research is needed. To guide decision-making by the ordering and treating provider, the recommended dietary allowance for selenium is 55mcg for adults who are not pregnant or breastfeeding, and the daily tolerable upper intake level is 400mcg.