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Effects of Step-Wise Increases in Dietary Carbohydrate on Circulating Saturated Fatty Acids and Palmitoleic Acid in Adults with Metabolic Syndrome
PLoS One (2014)
  • Brittanie M. Volk
  • Laura J. Kunces
  • Daniel Freidenreich, Rowan University
  • Brian R. Kupchak
  • Catherine Saenz
  • Juan C. Aristizabal
  • Maria Luz Fernandez
  • Richard S. Bruno
  • Carl M. Maresh
  • William J. Kraemer
  • Stephen D. Phinney
  • Jeff S. Volek
Abstract
Recent meta-analyses have found no association between heart disease and dietary saturated fat; however, higher proportions of plasma saturated fatty acids (SFA) predict greater risk for developing type-2 diabetes and heart disease. These observations suggest a disconnect between dietary saturated fat and plasma SFA, but few controlled feeding studies have specifically examined how varying saturated fat intake across a broad range affects circulating SFA levels. Sixteen adults with metabolic syndrome (age 44.9±9.9 yr, BMI 37.9±6.3 kg/m2) were fed six 3-wk diets that progressively increased carbohydrate (from 47 to 346 g/day) with concomitant decreases in total and saturated fat. Despite a distinct increase in saturated fat intake from baseline to the low-carbohydrate diet (46 to 84 g/day), and then a gradual decrease in saturated fat to 32 g/day at the highest carbohydrate phase, there were no significant changes in the proportion of total SFA in any plasma lipid fractions. Whereas plasma saturated fat remained relatively stable, the proportion of palmitoleic acid in plasma triglyceride and cholesteryl ester was significantly and uniformly reduced as carbohydrate intake decreased, and then gradually increased as dietary carbohydrate was re-introduced. The results show that dietary and plasma saturated fat are not related, and that increasing dietary carbohydrate across a range of intakes promotes incremental increases in plasma palmitoleic acid, a biomarker consistently associated with adverse health outcomes.
Keywords
  • Carbohydrates,
  • Fats,
  • Diet,
  • Blood plasma,
  • Fatty acids,
  • Lipids,
  • Carbohydrate metabolism,
  • Metabolic disorders
Publication Date
November, 2014
DOI
10.1371/journal.pone.0113605
Citation Information
Brittanie M. Volk, Laura J. Kunces, Daniel Freidenreich, Brian R. Kupchak, et al.. "Effects of Step-Wise Increases in Dietary Carbohydrate on Circulating Saturated Fatty Acids and Palmitoleic Acid in Adults with Metabolic Syndrome" PLoS One Vol. 9 Iss. 11 (2014) p. e113605 ISSN: 1932-6203
Available at: http://works.bepress.com/daniel-freidenreich/6/
Creative Commons license
Creative Commons License
This work is licensed under a Creative Commons CC_BY International License.