Indice Glucémico De Los Dátiles

Alkaabi et al. Nutrition Journal 2011, 10:59 http://www.nutritionj.com/content/10/1/59

RESEARCH

Open Access

Glycemic indices of five varieties of dates in healthy and diabetic subjects
Juma M Alkaabi1*, Bayan Al-Dabbagh1, Shakeel Ahmad2, Hussein F Saadi1, Salah Gariballa1 and Mustafa Al Ghazali2
Abstract
Background: This study was designed to determine the glycemic indices of fivecommonly used varieties of dates in healthy subjects and their effects on postprandial glucose excursions in individuals with type 2 diabetes mellitus. Methods: Composition analysis was carried out for five types of dates (Tamer stage). The weights of the flesh of the dates equivalent to 50 g of available carbohydrates were calculated. The study subjects were thirteen healthy volunteers with a mean(± SD) age of 40.2 ± 6.7 years and ten participants with type 2 diabetes mellitus (controlled on lifestyle measures and/or metformin) with a mean HbA1c (± SD) of 6.6 ± (0.7%) and a mean age (± SD) of 40.8 ± 5.7 years. Each subject was tested on eight separate days with 50 g of glucose (on 3 occasions) and 50 g equivalent of available carbohydrates from the 5 varieties of date (each on one occasion).Capillary glucose was measured in the healthy subjects at 0, 15, 30, 45, 60, 90 and 120 min and for the diabetics at 0, 30, 60, 90, 120, 150 and 180 min. The glycemic indices were determined as ratios of the incremental areas under the response curves for the dates compared to glucose. Statistical analyses were performed using the Mann-Whitney U test and repeated measures analysis of variance.Results: Mean glycemic indices ± SEM of the dates for the healthy individuals were 54.0 ± 6.1, 53.5 ± 8.6, 46.3 ± 7.1, 49.1 ± 3.6 and 55.1 ± 7.7 for Fara’d, Lulu, Bo ma’an, Dabbas and Khalas, respectively. Corresponding values for those with type 2 diabetes were very similar (46.1 ± 6.2, 43.8 ± 7.7, 51.8 ± 6.9, 50.2 ± 3.9 and 53.0 ± 6.0). There were no statistically significant differences in theGIs between the control and the diabetic groups for the five types of dates, nor were there statistically significant differences among the dates’ GIs (df = 4, F = 0.365, p = 0.83). Conclusion: The results show low glycemic indices for the five types of dates included in the study and that their consumption by diabetic individuals does not result in significant postprandial glucose excursions. Thesefindings point to the potential benefits of dates for diabetic subjects when used in a healthy balanced diet. Trial Registration Number: ClinicalTrials.gov NCT01307904

Background The date palm (Phoenix dactylifera L.) is one of mankind’s oldest cultivated plants. There are more than 2000 different varieties of dates [1], which have been used as food for over 6000 years. Dates are grown mostlybetween latitudes 10°N and 39°N [2] and are the most common fruit crop grown in the United Arab Emirates (UAE), occupying about 30% of the cultivated land [3]. Dates are rich in carbohydrates (total sugars, 44-88%), salts, minerals, vitamins, fatty acids (0.2-0.5%), proteins
* Correspondence: j.kaabi@uaeu.ac.ae 1 Department of Internal Medicine, Faculty of Medicine and Health Sciences, UnitedArab Emirates University, United Arab Emirates Full list of author information is available at the end of the article

(2.3-5.6%), and fibers (6.4-11.5%) [4-6]. The development of the fruit is classified into four stages. Stage 1: ‘Kimiri’ stage, stage 2: ‘Khalal’ stage, stage 3: ‘Rutab’ stage and stage 4: ‘Tamer’ stage. The tamer stage is the final stage of maturation when the date has dried to afairly firm consistency with a darker color [4]. The daily consumption of dates is a deeply rooted tradition in many societies, including those in the UAE. In Oman, which lies immediately adjacent to the UAE, the per capita daily consumption of dates is estimated at 55-164 grams and thus constitutes a vital component of the daily diet [7]. The UAE has developed rapidly over the last 40 years...