Hydroxythin contains MaHuang that is a "non-selective" sympathomimetic, which means that it acts as
a general stimulant on many parts of the body simultaneously (lungs,
heart, blood vessels, adrenal glands, etc.). It is most often used
as a central nervous system stimulant (for alertness or energy), as
a decongestant (for asthma/breathing aid) and as an appetite suppressant
in a wide variety of weight loss and "thermogenic" type products.