I had been wondering about any factual underpinnings for detoxification with cilantro and chlorella and therefore Googled "Grover's Disease and mercury." I found the following letter to the editor of a medical site, written by a dermatologist:

"An article was published in the Cutaneous and Ocular Toxicology Volume 24, Number1 entitled “Age related macular degeneration and cutaneous signs of mercury toxicity” which showed that Grover’s disease (transient acantholytic dermatitis) correlates very well with blood mercury levels and can be successfully treated with chelation and avoidance of exposure to mercury, especially seafood (1). This is important because Grover’s disease is increasing in incidence and present treatments are ineffective. This is also important because Grover’s disease coexists with other diseases, especially neurologic diseases, and may give some insight into the etiology of those diseases. The environment is becoming increasingly recognized as a cause of human diseases and it is important to identify these to help eradicate them.
Thank you,

Sincerely, Paul Dantzig MD (PIDMD@aol.com)"
[https://www.tandfonline.com/doi/full/10.3109/15569520903266268]

The abstract of the article to which he refers, also authored by him, can be found at:
https://pubmed.ncbi.nlm.nih.gov/16832218/ It says:

"Parkinson's disease, macular degeneration and cutaneous signs of mercury toxicity
Paul I Dantzig
PMID: 16832218 DOI: 10.1097/01.jom.0000228351.74230.52
Abstract
Objective: The objective of this study was to determine if there was a relationship between Grover's disease and Parkinson disease.

Methods: Fourteen patients with Parkinson disease and 14 control patients were randomly selected and examined for cutaneous eruptions and blood mercury levels.

Results: Of the 14 patients with Parkinson's disease, 13 had Grover's disease and detectable blood mercury. None of the patients in the control group had a cutaneous eruption and only 2of the 14 had detectable blood mercury.

Conclusion: Mercury may play a role in the etiology of Parkinson disease and Grover's disease."