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List of discredited substances

This page forms a list of substances or materials which are generally considered to be discredited. A substance may be discredited in one of three ways:

  1. It was widely believed to exist at one time but is not anymore. Such substances are often part of an obsolete scientific theory.
  2. It was once believed to have drastically different properties from those accepted now. Significant properties it was widely claimed and believed to possess are no longer accepted.
  3. It is currently believed to exist as part of a theory which has not been generally accepted by mainstream science.

There is a separate list of fictional toxins which are the complete invention of various movies, television, novels, comic books, etc.


  1. ^ This is not to be construed as implying that these items–as they are understood today–are discredited. What is listed are fire, water, metal, etc. qua classical elements.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "List_of_discredited_substances". A list of authors is available in Wikipedia.
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