Incidentally, tetraethyllead was first added to gasoline in 1923 and it quickly became obvious that workers at the three manufacturing plants were becoming psychotic and dying from its toxic effects. The issue was essentially hushed up and “research” between 1926 and 1965 claimed a consensus that lead was only a problem at high exposure levels and atmospheric lead from vehicle exhausts was not a problem at all. We now know Indium Wire different, thanks partly to the efforts of Schroeder.
*Schroeder did not, as far as I know, despite the wording of the above quote, develop a method for removing lead from gasoline. Why would you need to do that? The petrochemical companies used to add tetraethyl lead as an antiknocking agent, so the simplest method for its “removal” is just not to add it in the first place. You don’t need to develop a method to remove lead from petrol!
This item originally published July 25, 2005, was overhauled and updated on July 2, 2008.
So, who do you trust most, a Indium Ingot website hoping to get repeat sales based on your fears of poor health as you get older, or a well-respected site from a leading research team at a top university? I’m pretty sure I don’t want to be ingesting an indium compound daily for the rest of my life in the vague hope that represents some undiscovered panacea, that would just be bad medicine
All indium compounds should be regarded as highly toxic. Indium compounds damage the heart, kidney and liver, and may be teratogenic
Yet, the web is littered with so-called health food sites selling indium sulfate to unwitting consumers, presumably, exploiting that marketing guidance I found on at least one site. However, there is one site to which I shall refer you and that is the webelements site from Sheffield University’s Mark Winter. the entry for indium explains that depending on dose (by injection):
However, Schroeder, towards the end of his life, wheelchair bound with muscular dystrophy, included indium in some of his last few experiments. He apparently, demonstrated that lab animals, on lifetime indium, had fewer cancers than controls. Other than references to the use of indium in imaging agents, I can find nothing in the medical literature regarding the positive health benefits of daily supplementation with Indium, not then, not now.
So, where do the supposed health benefits of indium come from or is it just a marketing scam? What about those claims that it affects the activity of glands in the brain. Well, indium is an element in the same group of the periodic table as boron, aluminium, and gallium, oh and thallium, so one would not expect it to be particularly beneficial or even essential to health. Indeed, aluminium is a neurotoxin.
It then tells us how these pertain to indium (In, element 49) and how a clever marketer might exploit the patent on the health benefits of indium.

http://www.indiumsupplier.com/indium-news/143-benefits-of-indium