Elsevier

Nutrition

Volume 31, Issue 1, January 2015, Pages 90-96
Nutrition

Applied nutritional investigation
Effects of brown and golden flaxseed on the lipid profile, glycemia, inflammatory biomarkers, blood pressure and body composition in overweight adolescents

https://doi.org/10.1016/j.nut.2014.05.002Get rights and content
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Abstract

Background

Flaxseed is a promising alternative to reduce the risk of diseases associated with body weight excess because it is rich in a-linolenic acid, lignans, and dietary fiber. Flaxseed (Linum usitatissimum) can be found in brown and golden varieties; however, questions have arisen as to whether the variety may influence the health effects.

Objective

The objective of this study was to compare the effects of brown and golden flaxseeds on lipid profile, glycemia, blood pressure, inflammatory status,body weight, and body composition in overweight adolescents.

Methods

Seventy-five overweight adolescents (33 boys, 42 girls; age 13.7 ! 2.1 y), from Alegre–ES, Brazil, were randomized to one of the three groups (n ¼ 25) on a parallel, single-blind clinical trial. They received 28 g/d of brown flaxseed (BF), golden flaxseed (GF), or the equivalent amount of wheat bran (Control, CG) in different preparations at school from Monday to Friday for 11 wk. Blood pressure, anthropometric evaluation, and the analyses of blood total cholesterol, lipoproteins, glucose, and inflammatory markers were performed at the beginning and at the end of the intervention. The data were analyzed by ANCOVA at 5% significance.

Results

The groups who consumed brown and golden flaxseed showed significant reduction in diastolic blood pressure. Brown and golden flaxseed did not differentially affect plasma lipid responses, plasma glucose and inflammatory profile, although all groups (BF, GF, and CG) showed increased levels of TNF-a.

Conclusions

The adolescents consumed about half the daily amount provided, which may not have been sufficient to exert the health benefits of flaxseed reported in the literature, concerning the lipid profile, inflammation biomarkers and body composition.

Keywords

Flaxseed
Physiological effects
Adolescents
Overweight

Cited by (0)

All authors contributed substantially in terms of conception and design of the study, generation, collection, analysis and interpretation of data, drafting, critical reviewing and editing subsequent versions of the manuscript. The authors approved the final version of the manuscript and declare no conflict of interest.