The only references I can find to nails are the usual rumors with
everybody giving uninformed opinions, both pro and con, on sites
like justanswer and yahoo.
Toenails are not a significant part of the gold excretion process
according to these two studies:
The first, a study of metabolism of gold used in rheumatoid
arthritis treatments showed, “…70% is recovered in the urine.
Highest gold concentrations are found in the reticuloendothelial
system, adrenal glands and kidneys, while the bone marrow, liver,
skin and bone contain the greatest quantities of gold.” Metabolism
and distribution of gold compounds. Gottlieb, NL., J Rheumatol
The second more recent study says: "When gold is given orally, 85UKP
95% is excreted in feces and the remaining 5UKP 15% in urine,
regardless of dose. The majority of gold recovered in the feces
represents nonabsorbed gold, gold breakdown products, gold shed from
mucosal cells to which it was adsorbed and a minor contribution from
the biliary tract."Gold Nanoparticles: A Revival in Precious Metal
Administration to Patients; A. S. Thakor, J. Jokerst, C. Zavaleta,
T. F. Massoud, and S. S. Gambhir. pubs. acs.org/NanoLett; 2011.
Reading other articles, it seems the quantities excreted and
retained seem to be related to the size of the particles and manner
Carol J. Bova