title: Gamma linolenic acid (GLA) content of encapsulated evening primrose oil products.
abstract: The fatty acid composition of 16 brands of evening primrose oil (EPO) capsules was determined by capillary gas chromatography. Fourteen of these EPO brands contained gamma-linolenic acid (GLA) levels between 7% and 10% (mean, 8.7; range, 1.9-10.5%) and there was generally good agreement between the level of GLA claimed by the manufacturer and the level determined by analysis. Low levels of the monoenes 22:1 and 24:1 found in some brands may indicate contamination of EPO with borage oil.
authors.affiliation: Department of Pediatrics and Child Health, Flinders Medical Centre, Adelaide, Australia.
authors.forename: R A
authors.initials: RA
authors.lastname: Gibson
authors.forename: D R
authors.initials: DR
authors.lastname: Lines
authors.forename: M A
authors.initials: MA
authors.lastname: Neumann
mesh_terms: D002214:Capsules / Q000032:analysis; D002849:Chromatography, Gas; D004042:Dietary Fats, Unsaturated / Q000032:analysis*; D008042:Linolenic Acids / Q000032:analysis*; D010938:Plant Oils / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry; D017965:gamma-Linolenic Acid
chemical_list: D002214:Capsules; D004042:Dietary Fats, Unsaturated; D008042:Linolenic Acids; D010938:Plant Oils; D017965:gamma-Linolenic Acid