What is a pseudovitamin?

Answer 1

A pseudovitamin is one contained in a food or natural source which looks chemically like a vitamin needed for human or animal health but lacks the bioavailable capability to be absorbed and used by the human or animal body.

Answer 2

A pseudovitamin is a substance that was once classified as a vitamin due to its importance for health but later determined to not meet all the criteria of a vitamin, such as being essential for life or not being produced in sufficient amounts by the body. An example is laetrile, once considered a B vitamin but later found to have no essential role in human nutrition.