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

  • Dragana Djurica (a1), Roberta R. Holt (a1), Jingyan Ren (a1), Alan W. Shindel (a2), Robert M. Hackman (a1) and Carl L. Keen (a1) (a3)...

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.

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Corresponding author

* Corresponding author: C. L. Keen, fax +1 530 752 8966, email clkeen@ucdavis.edu

References

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Keywords

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

  • Dragana Djurica (a1), Roberta R. Holt (a1), Jingyan Ren (a1), Alan W. Shindel (a2), Robert M. Hackman (a1) and Carl L. Keen (a1) (a3)...

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