Characterization of flaxseed (Linum usitatissimum L.) grown in Venezuela

• Published in: Archivos latinoamericanos de nutrición Vol. 62; no. 2; pp. 192 - 200
• Main Authors: Cuevas, Zoitza Ostojich, Sangronis, Elba
• Format: Journal Article
• Language: Spanish
• Published: Venezuela 01.06.2012
• Subjects: Antioxidants - analysis; Canada; Flax - chemistry; Flax - microbiology; Food Microbiology; Functional Food; Hydrogen Cyanide - analysis; Plant Mucilage - analysis; Polyphenols - analysis; Seeds - chemistry; Seeds - microbiology; Venezuela; Canada; Venezuela
• ISSN: 0004-0622

In recent years, the consumption of flaxseed (Linum usitatissimum L.) has been promoted as a functional food for its health benefits, mainly attributable to its content of omega-3 fatty acids, lignans and dietary fiber. This study evaluated the microbiological quality, chemical composition and antioxidant properties of flaxseed grown in Venezuela and compared them to the values of a Canadian variety widely sold in the country. Total coliforms, molds and yeasts, S. aureus and sporulated of the genera Bacillus (aerobic) and Clostridium (anaerobic), moisture, fat, protein, total dietary fiber, soluble and insoluble, mucilage, minerals, fatty acid profile, equivalent HCN content, aw, color, polyphenols and antioxidant properties, like antiradical efficiency (AE), concentration of antioxidant needed to decrease the initial concentration by 50 %EC50) and the time required to reach the EC50 (TEC50) were evaluated. Significant differences in seed composition were determined, where its high content of fat, protein, alfa-linolenic acid and dietary fiber stand out. Differences were observed in the mucilage content, but not in soluble, insoluble and total fiber content. Equivalent HCN concentration in both seeds is in the order of 40 mg/100 g, which poses no health risks, considering their consumption patterns. Venezuelan flaxseed contains higher content of polyphenols than the Canadian does, but the antioxidant capacity of the latter is higher; both have an EA rated as average and a slow reaction time (TEC50 > 30 min).