Horny Goat Weed (Herba Epimedium grandiflorum):
Yin Yang Huo in Traditional Chinese Medicine which has been loosely
translated by some as "licentious goat plant" and explains why
Western supplement companies have adopted the titillating name by
which it is known in the U.S: (horny goat weed).
Epimedium is grown
as an ornamental herb in Asia and the Mediterranean region, and
various species are used for medicinal purposes. The use of epimedium
as a medicinal herb dates back to at least 400 A.D., where it has
been used as a tonic for the reproductive system (boosting libido and
treating impotence) and as a rejuvenating tonic (to relieve fatigue).
Epimedium is thought to work via modulation of cortisol levels (the
primary stress hormone). Under conditions of high stress, the
increased cortisol levels are known to cause fatigue and depress sex
drive - so bringing cortisol levels back into normal ranges is also
thought to help restore normal metabolism, energy levels and libido.
There is also evidence that epimedium can restore low levels of both
testosterone and thyroid hormone (bringing low levels back to their
normal levels) - which may account for some of the benefits of
epimedium in improving libido (sex drive).
Animal studies using
epimedium have shown a reduction in bone breakdown, an increase in
muscle mass, and a loss of body fat-each of which may be linked to
the observed return of abnormal cortisol levels back to normal values
(and rhythm).
In a series of studies conducted in humans and animals
by Chinese researchers, immune-system function was directly
suppressed and bone loss was accelerated, by using high-dose
synthetic cortisol (glucocorticoid drugs).
Subsequent administration
of epimedium extract reduced blood levels of cortisol and improved
immune immune-system function (in the humans) and slowed bone loss
and strengthened bones (in the animals).
