Effects of a dietary strawberry powder on parameters of vascular health in adolescent males

Dragana Djurica, Roberta R. Holt, Jingyan Ren, Alan W Shindel, Robert M. Hackman, Carl L Keen

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Previous studies have shown that the intake of freeze-dried strawberry powder (FDSP) improves select markers of cardiovascular health in adults with cardiovascular risk factors; however, whether these improvements can be observed in at-risk adolescents is unknown. A randomised, double-blind, cross-over study enrolled twenty-five overweight or obese males, aged 14-18 years, to consume 50 g of a FDSP or a control powder, daily for 1 week. Before and after each test period, measures of microvascular function, plasma nitrate/nitrite, platelet reactivity and blood lipids were collected at baseline and acutely 1 h after FDSP intake. Acute plasma nitrate/nitrite levels increased 1 h after consuming the FDSP during Study Visit 1 before daily FDSP intake (P<0·001) and during Study Visit 2 after 1 week of FDSP intake (P<0·001) compared with control powder intake. As a group, fasting nitrate/nitrite levels did not significantly change after 1 week of control or FDSP intake. However, for those individuals where fasting nitrate levels increased after short-term FDSP intake compared with controls, an increase in reactive hyperaemia index (RHI) was observed (P=0·014), whereas RHI was unchanged in those individuals who did not have a significant increase in nitrate (P=0·396). Taken together, these data support the concept that strawberries can provide vascular health benefits to heavier adolescent males.

Original languageEnglish (US)
Pages (from-to)639-647
Number of pages9
JournalBritish Journal of Nutrition
Volume116
Issue number4
DOIs
StatePublished - Aug 28 2016

Keywords

  • Nitrate
  • Obese adolescents
  • Peripheral arterial tonometry
  • Strawberry powder

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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