n-6 Fatty acids and cardiovascular health: a review of the evidence for dietary intake recommendations

Br J Nutr. 2010 Sep;104(6):788-96. doi: 10.1017/S0007114510002096. Epub 2010 Jun 4.

Abstract

n-6 PUFA are well known for their critical role in many physiological functions and seem to reduce risks of CHD. However, some argue that excessive consumption of n-6 PUFA may lead to adverse effects on health and therefore recommend reducing dietary n-6 PUFA intake or fixing an upper limit. In this context, the present work aimed to review evidence on the link between n-6 PUFA and risks of CVD. Epidemiological studies show that n-6 PUFA dietary intake significantly lowers blood LDL-cholesterol levels. In addition, n-6 PUFA intake does not increase several CVD risk factors such as blood pressure, inflammatory markers, haemostatic parameters and obesity. Data from prospective cohort and interventional studies converge towards a specific protective role of dietary n-6 PUFA intake, in particular linoleic acid, against CVD. n-6 PUFA benefits are even increased when SFA intake is also reduced. In regards to studies examined in this narrative review, recommendation for n-6 PUFA intake above 5 %, and ideally about 10 %, of total energy appears justified.

Publication types

  • Review

MeSH terms

  • Cardiovascular Diseases / prevention & control*
  • Dietary Fats / administration & dosage*
  • Fatty Acids / administration & dosage
  • Fatty Acids, Omega-6 / administration & dosage
  • Fatty Acids, Omega-6 / adverse effects
  • Fatty Acids, Omega-6 / therapeutic use*
  • Humans
  • Linoleic Acid / therapeutic use
  • Nutrition Policy*
  • Risk Factors

Substances

  • Dietary Fats
  • Fatty Acids
  • Fatty Acids, Omega-6
  • Linoleic Acid