How we ingest /absorb Heavy Metals?
Sources and routes of Lead exposure
People can become exposed to lead through occupational and environmental sources.
This mainly results from:
inhalation of lead particles generated by burning materials containing lead, for example, during smelting, recycling, stripping leaded paint, and using leaded gasoline or leaded aviation fuel; and
ingestion of lead-contaminated dust, water (from leaded pipes), and food (from lead-glazed or lead-soldered containers).
An additional source of exposure is the use of certain types of unregulated cosmetics and medicines. High levels of lead have, for example, been reported in certain types of kohl, as well as in some traditional medicines used in countries such as India, Mexico and Viet Nam. Consumers should therefore take care only to buy and use regulated products.
Once lead enters the body, it is distributed to organs such as the brain, kidneys, liver and bones. The body stores lead in the teeth and bones where it accumulates over time.
source for above: WHO - http://www.who.int/news-room/fact-sheets/detail/lead-poisoning-and-health
Also see - Lead exposure in Ireland
Search PubMed - using search terms in bold:
* numbers of studies available as of Oct-2018
Heavy metals in water - 67383 studies
Heavy metals in Foods - 43514 studies
Occupational heavy metal exposure - 9318 studies
Additional Routes of Exposure
Extensive list from Australian site.
Lead Toxicity - Where Is Lead Found