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  • Title: The glycaemic index of spaghetti and gastric emptying in non-insulin-dependent diabetic patients.
    Author: Thomsen C, Rasmussen OW, Christiansen C, Andreasen F, Poulsen PL, Hermansen K.
    Journal: Eur J Clin Nutr; 1994 Nov; 48(11):776-80. PubMed ID: 7859695.
    Abstract:
    OBJECTIVE: In the dietary treatment of non-insulin-dependent diabetes mellitus (NIDDM) great interest has been focused on foods with low glycaemic indices. Spaghetti has a low glycaemic index, but in NIDDM the underlying mechanism has not been elucidated. We investigated whether the low glycaemic index in spaghetti was the result of a retarded gastric emptying. DESIGN: Randomized study. SETTING: Department of Endocrinology & Metabolism, Aarhus County Hospital. SUBJECTS: Eight NIDDM in-patients participated without drop-outs. INTERVENTIONS: Paracetamol was used as a marker of the gastric emptying. On three different occasions the patients ingested 40 g of carbohydrate as: (1) spaghetti without paracetamol, (2) spaghetti containing 1.5 g paracetamol, and (3) mashed potatoes with 1.5 g paracetamol added. During the 4 h observation periods blood samples were drawn frequently. The spaghettis were industrially manufactured. RESULTS: The spaghetti meals induced similar glucose and insulin responses. The potato meal induced significantly higher glucose and paracetamol areas [607 +/- 108 vs 284 +/- 54 mmol/l*240 min (P = 0.02), and 18,668 +/- 999 vs 4979 +/- 369 mumol/l*240 min (P < 0.02)] as well as lower emptying index (time(peak)/peak concentration ratio of paracetamol) [2.1 +/- 0.3 vs 0.4 +/- 0.1 (P = 0.001)], as compared with the spaghetti meal. CONCLUSIONS: This study shows that the ingestion of spaghetti was associated with a slower gastrointestinal accessibility of the carbohydrates, which accounts for the low glycaemic index of spaghetti in NIDDM subjects.
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