Cramp Bark
(Viburnum opulus) 350mg pure powdered herb.
Dried bark of Viburnum opulus, a shrub indigenous to North America, is the active ingredient. Constituents are resin, viburnin, valeric acid and tannin. Valued for reasons associated with the plant's common name. Sometimes used by women together with Agnus Castus.
; "Cramp Bark 350mg")
