DEFINITION

Rhodiola crenulata Root and Rhizome Dry Extract is prepared from the dried roots and rhizomes of Rhodiola crenulata (Hook.f. & Thomson) H.Ohba (alt. name Sedum crenulatum Hook.f. & Thomson) (Fam. Crassulaceae), collected after the scape withers in autumn, by extraction with alcohol or a hydroalcoholic mixture. It contains NLT 90.0% and NMT 110.0% of the labeled amount of total phenylethanoids, calculated as the sum of salidroside (C₁₄H₂₀O₇) and tyrosol (C₈H₁₀O₂) on the dried basis, and NLT 2.0% of salidroside on the dried basis. It may contain suitable added substances as carriers.