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Stina Ramne

Doctoral student

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Sugar consumption and cardiometabolic risk. With a focus on the urinary sucrose and fructose biomarkers.

Author

  • Stina Ramne

Summary, in English

Introduction: In contrast to the intake of sugar-sweetened beverages (SSBs), the evidence linking added sugar intake to the risk of cardiometabolic disease (primarily referring to cardiovascular disease and type 2 diabetes (T2D)) is contradictory.
Aim: The aim of this thesis is to elucidate the role of added sugar intake in the risk for cardiometabolic diseases. To obtain further understanding of such a potential association, the aims include exploring differences between the intake of added sugar and different added sugar sources, studying an objective biomarker of sugar intake and investigating various pathways through which added sugar intake could possibly affect cardiometabolic risk.
Method: In the Malmö Diet and Cancer study and the Malmö Offspring Study, both cross-sectional and prospective associations of intake of added sugar and sugar-rich foods and beverages were investigated along with various cardiometabolic risk markers, cardiometabolic incidence outcomes, the gut microbiota composition and the plasma proteome. Furthermore, the urinary sucrose and fructose biomarkers were investigated from overnight urine samples in the Malmö Offspring Study and from 24-h urine samples in individuals with prediabetes in the PREVIEW study.
Results: U-shaped associations between added sugar intake and all-cause and cardiovascular mortality, T2D incidence and C-reactive protein have been observed, whereas SSB intake was associated with increased all-cause mortality, a higher Firmicutes:Bacteroidetes ratio and a lower abundance of the genus Lachnobacterium in the gut, as well as a T2D-related plasma proteomic profile. Furthermore, the urinary sucrose and fructose biomarkers in overnight urine samples was found to be a useful complement to self-reported sugar intake, but the 24-h urinary sucrose and fructose biomarkers did not perform optimally in a population with prediabetes.
Conclusion: The intake of SSBs was consistently associated with higher cardiometabolic risk via various measures, whereas the total intake of added sugars showed a U-shaped association with cardiometabolic risk. Future evaluation of these associations can be aided by the use of the urinary sucrose and fructose biomarkers, except in already metabolically impaired individuals, in whom this biomarker may not provide an accurate enough measure of sugar intake.

Department/s

  • Nutrition Epidemiology
  • EpiHealth: Epidemiology for Health

Publishing year

2021

Language

English

Publication/Series

Lund University, Faculty of Medicine Doctoral Dissertation Series

Issue

2021:80

Document type

Dissertation

Publisher

Lund University, Faculty of Medicine

Topic

  • Nutrition and Dietetics

Keywords

  • Added sugar
  • Sugar-sweetened beverages
  • Cardiometabolic risk
  • Type 2 diabetes
  • Cardiovascular disease
  • Urinary sugar biomarker
  • Sucrose and fructose excretion
  • Gut microbiota
  • Plasma proteome

Status

Published

Research group

  • Nutrition Epidemiology

Supervisor

  • Emily Sonestedt
  • Gunnar Engström

ISBN/ISSN/Other

  • ISSN: 1652-8220
  • ISBN: 978-91-8021-086-7

Defence date

10 September 2021

Defence time

13:00

Defence place

Aulan, CRC, Jan Waldenströms gata 35, Skånes Universitetssjukhus i Malmö. Join by Zoom: https://lu-se.zoom.us/j/65281149600?pwd=aHpOQlpwK1RRNEFyWnJESlhFU29Xdz09 password: 809197

Opponent

  • Berit Lilienthal Heitmann (Professor in Nutritional Epidemiology)