Earlier quoted context omitted.
Gold is toxic if consumed regularly. The symptoms of gold poisoning are no different than other forms of metal poisoning. The primary difference between gold and uranium is that gold isn't very reactive and so it has virtually no contact toxicity. Also, some people are allergic to gold, which does manifest contact toxicity.
Metallic gold is completely safe to consume. You'd have to be taking deliberately prepared compounds to suffer from toxicity.
> Although the gold ion is toxic, the acceptance of metallic gold as a food additive is due to its relative chemical inertness, and resistance to being corroded or transformed into soluble salts (gold compounds) by any known chemical process which would be encountered in the human body.
This is true of known natural metabolic processes, but not true with connection to certain drug interactions. Gold is not chemically inert and can be converted into an ion or gold salt, even within the body, when mixed with other reactive non-toxic chemicals. Gold metal is popularly consumed in trace amounts of certain alcoholic beverages and there are many medications that should not be taken in connection with alcohol for many different metabolic altering processes. I am not sure if it has been thoroughly tested, but a combination of gold and nangarin could also result in potentially toxic consequences, which is why certain fruits are forbidden with consumption of certain other chemicals/drugs.
This is exceedingly rare though, since platinum group metals are so expensive, but the same conditions are observed with other platinum group metals. Silver is more toxic than gold because it is more reactive, but the behaviors are similar. A major symptom of advanced toxicity from platinum group metals is a changing of skin color towards the metallic color of the metal toxin.