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Percorrer por autor "Polck, Denise"

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  • Olive leaf tea impact on postprandial glycemia: a randomized cross-over trial
    Publication . Meireles, Manuela; Cortez-Ribeiro, A.C.; Polck, Denise; Almeida-de-Souza, Juliana; Ferro-Lebres, Vera
    This study investigates the effect of olive leaf tea (OLT) on postprandial glycemia in healthy volunteers when ingested with a high-carbohydrate meal, compared with a placebo tea (CON). Healthy adults participated in a double-blind, randomized, placebo-controlled, and cross-over design trial receiving a high-rich carbohydrate meal with either 250 mL of OLT or CON at two different times after a washout period. The sequence order was randomized at a ratio of 1:1. Capillary blood glucose was measured in a 2 h period after ingestion. Eighteen participants were initially randomized. Of these, thirteen completed the trial and were analyzed. The consumption of OLT resulted in a delay in peak time (48.5 +/- 4.2 min vs. 35.7 +/- 4.0 min, p = 0.03) and a significant increase in glucose area under the curve compared to placebo (14,502.7 +/- 640.8 vs. 13,633.3 +/- 869.4 mg/dL center dot min, p = 0.03). Results are depicted as mean +/- SEM. The OLT and CON palatability were generally well accepted. No adverse effects were reported. OLT did not ameliorate a glycemic curve induced by carbohydrate-rich meal ingestion, suggesting that at least when ingested acutely in a single meal, OLT does not have antihyperglycemic effects. Future studies should account for chronic consumption providing a better understanding of glycemic regulation over time.
    2023Artigo científico Acesso aberto Ver mais
  • Postprandial glycemia after a high-rich carbohydrate meal: a randomized cross-over clinical trial on olive leaf tea effect
    Publication . Meireles, Manuela; Polck, Denise; Cortez-Ribeiro, Anna Carolina; Almeida-de-Souza, Juliana; Ferro-Lebres, Vera
    Infusions of olive leaves have been used in traditional herbal medicine as a way to treat and prevent many diseases, including diabetes. Olive leaves are naturally rich in oleuropein, and previous studies have shown the potential of oleuropein in mitigating diabetes and diabetes complications in vitro and in vivo. This study aimed to investigate the effect of natural olive leaves tea on postprandial glycemia in healthy volunteers, when ingested with a high-carbohydrate meal comparing with a placebo tea. The hypothesis present was that olive leaf tea would improve glycemic control and modulate postprandial glycaemia.
    2022Documento de conferência Acesso aberto Ver mais