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Preliminary report: the effect of a 6-month dietary glycemic index manipulation in addition to healthy eating advice and weight loss on arterial compliance and 24-hour ambulatory blood pressure in men: a pilot study

journal contribution
posted on 2023-06-08, 12:54 authored by Elena Philippou, Candace Bovill-Taylor, Chakravarthi RajkumarChakravarthi Rajkumar, Maria Luisa Vampa, Eleana Ntatsaki, Audrey E Brynes, Mary Hickson, Gary S Frost
We aimed to determine whether altering dietary glycemic index (GI) in addition to healthy eating and weight loss advice affects arterial compliance and 24-hour blood pressure (BP), both coronary heart disease (CHD) risk factors. Middle-aged men with at least 1 CHD risk were randomized to a 6-month low-GI (LGI) or high-GI (HGI) diet. All were advised on healthy eating and weight loss. They were seen monthly to assess dietary compliance and anthropometrics. Carotid-femoral pulse wave velocity (PWV), fasting blood lipid profile, and glucose and insulin concentrations were measured at baseline and at months 3 and 6. Six-hour postprandial glucose and insulin responses and 24-hour ambulatory BP were also assessed at baseline and month 6. Thirty-eight subjects (HGI group, n = 16; LGI group, n = 22) completed the study. At month 6, groups differed in dietary GI, glycemic load, and carbohydrate intake (P < .001). Fasting insulin concentration and insulin resistance (calculated by homeostatic model assessment) were lower in the LGI than the HGI group (P < .01). The reduction in total cholesterol and 24-hour BP was bigger in the LGI than the HGI group (P < .05); and only the LGI group had significant reductions (P < .05) in PWV, low-density lipoprotein cholesterol, and triacylglycerol concentration. There were no differences in postprandial glucose or insulin responses between the groups. The results suggest that an LGI diet may be more beneficial in reducing CHD risk, including PWV and 24-hour BP, even in the setting of healthy eating and weight loss; and thus, further study is warranted.

History

Publication status

  • Published

Journal

Metabolism

ISSN

0026-0495

Publisher

Elsevier

Issue

12

Volume

58

Page range

1703-1708

Department affiliated with

  • Clinical and Experimental Medicine Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2012-11-01

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