Why Are the Stimulants Ephedrine, Sibutramine, and Methylhexaneamine Commonly Involved

Why are the stimulants ephedrine, sibutramine, and methylhexaneamine commonly involved in claims of inadvertent doping? Select all that apply.

A) Labeling often contains unrecognizable names.
B) Alternate names for the substances are not included on the banned substances list.
C) Herbal supplements are not typically banned.
D) These substances used to be considered legal.
E) Manufacturers are not required to list all ingredients on the label.