Phosphorus ingestion improves oral glucose tolerance of healthy male subjects: A crossover experiment
2015
Khattab, May | Abi-Rashed, Christelle | Ghattas, Hala | Hlais, Sani | Obeid, Omar Ahmad | Department of Nutrition and Food Sciences | Family Medicine | Faculty of Agricultural and Food Sciences (FAFS) | Faculty of Medicine (FM) | American University of Beirut
Background: Fasting serum phosphorus (P) was reported to be inversely related to serum glucose and insulin, while the impact of P ingestion is not well documented. The effect of P intake with or before glucose ingestion on postprandial glucose and insulin statuses was investigated. Method: Two cross over experiments using healthy male subjects were conducted. Experiment 1: Overnight fasted subjects (n∈=∈7) randomly received: 500 mg of P tablets, glucose (75 g) solution with placebo or 500 mg of P tablets. Experiment 2: Overnight fasted subjects (n∈=∈8) underwent similar procedures to those of experiment 1, except that placebo or 500 mg P tablets were given 60 min prior to glucose ingestion. Results: In both experiments, serum P decreased following glucose ingestion. Co-ingestion of P with glucose improved, at time 60 min, postprandial glucose (P∈<∈0.05), insulin (P∈<∈0.05), and insulin sensitivity index (p∈<∈0.006), while P pre-ingestion failed to exert similar effect. Conclusion: This study suggests that postprandial glucose and insulin are affected by exogenous P supply, especially when co-ingested with glucose. © 2015 Khattab et al.
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