Medical chelation is explained here: https://www.webmd.com/balance/guide/what-is-chelation-therapy. Natural chelation reportedly can be accomplished via the oral ingestion of cilantro and chlorella; this appears to be generally accepted. If you read through the Grover's forums here and on Facebook, you will see that many people swear by cilantro, or cilantro/chlorella, smoothies for relief, remission, and even cure. Since cilantro and chlorella are metal detoxifiers, I was researching whether there is a known link between Grover's and heavy metal toxicity. The findings reported above are all that I found from within the medical community. The evidence is far from conclusive, but at least it comes from a physician.