Specification :

Ingredient and purity :
15% min Petasins ( petasin + isopetasin).
C20H28O3. CAS:[26577-85-5].PA free.
This extract powder have not S-petasin

Function :
Petasin is responsible for the antispasmodic properties of the plant by reducing spasms in smooth muscle and vascular walls,
in addition to providing an anti-inflammatory effect by inhibiting leukotriene synthetics.
Petasin has also been found to be treat migraine headache, asthma , bronchitis.
Butterbur has also been used for cough ; urination and stomach problems.