symphytum officinale root

comfrey root quaker comfrey root symphytum officinalis root PubMed: Comparative Study of the Biological Activity of Allantoin and Aqueous Extract of the Comfrey Root. PubMed: Herbal medicine for low-back pain. PubMed: TLC densitometric method for screening of lycopsamine in comfrey root (Symphytum officinale L.) extracts using retrorsine as a reference compound. PubMed: Semi-automated separation of the epimeric dehydropyrrolizidine alkaloids lycopsamine and intermedine: preparation of their N-oxides and NMR comparison with diastereoisomeric rinderine and echinatine. PubMed: Comfrey root: from tradition to modern clinical trials. PubMed: Distinct cell-specific expression of homospermidine synthase involved in pyrrolizidine alkaloid biosynthesis in three species of the boraginales. PubMed: Effect of a blend of comfrey root extract (Symphytum officinale L.) and tannic acid creams in the treatment of osteoarthritis of the knee: randomized, placebo-controlled, double-blind, multiclinical trials. PubMed: MicroRNAs and their predicted target messenger RNAs are deregulated by exposure to a carcinogenic dose of comfrey in rat liver. PubMed: Absence of mutagenic effects of a particular Symphytum officinale L. liquid extract in the bacterial reverse mutation assay. PubMed: Lead chelation to immobilised Symphytum officinale L. (comfrey) root tannins. PubMed: Comparison of gene expression profiles altered by comfrey and riddelliine in rat liver. PubMed: Assays of physical stability and antioxidant activity of a topical formulation added with different plant extracts. PubMed: Efficacy and tolerance of a comfrey root extract (Extr. Rad. Symphyti) in the treatment of ankle distorsions: results of a multicenter, randomized, placebo-controlled, double-blind study. PubMed: A rapid cleanup method for the isolation and concentration of pyrrolizidine alkaloids in comfrey root. PubMed: The influence of phytohormones on growth, organ differentiation and fructan production in callus of Symphytum officinale L. PubMed: Mutagenic effects of aqueous extracts of Symphytum officinale L. and of its alkaloidal fractions. PubMed: [Development of root-layers of symphytum officinale L. and their storage and consumption of carbohydrates]. PubMed: [Annual developmental cycle of roots and shoots in Symphytum officinale L. in relation to storage and consumption of carbohydrates]. PubMed: Comfrey (Symphytum officinale L.) root; its anatomy and its detection in admixture with chicory in dandelion coffee.