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A favourite in the original edition of Dopeology, the timeline of products gets a more prominent space here.

The bars represent the time period during which each product has appeared in Dopeology incidents. It's by no means reflective of real-world trends - Amphetamine has been in use far longer - but it does demonstrate which substances or methods are enduringly popular.

Example: The evolution period of Triamcinolone acetonide in doping-related incidents is eight years: the product was first and last reported in 1999 and 2007 respectively.

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