Impact of Combined Prebiotic Galacto-Oligosaccharides and Bifidobacterium breve-Derived Postbiotic on Gut Microbiota and HbA1c in Prediabetic Adults: A Double-Blind, Randomized, Placebo-Controlled Study.
- 2024-07-10
- Nutrients 16(14)
- Beyda Beteri
- Monica Barone
- Silvia Turroni
- Patrizia Brigidi
- George Tzortzis
- Jelena Vulevic
- Karol Sekulic
- Diana-Elena Motei
- Adele Costabile
- PubMed: 39064648
- DOI: 10.3390/nu16142205
Study Design
- Type
- Randomized Controlled Trial (RCT)
- Population
- 53 prediabetic volunteers
- Methods
- randomised, double-blind, placebo-controlled, parallel-group clinical trial, 12 weeks of daily dietary fibre supplement (YMETA) or placebo (cellulose microcrystalline), followed by a 4-week follow-up
- Blinding
- Double-blind
- Duration
- 12 weeks
- Rigorous Journal
The complex interactions between intestinal microbiota and metabolic disorders are well-documented, with implications for glucose metabolism, energy expenditure, and intestinal permeability. Prebiotics induce beneficial changes in gut microbiota composition in prediabetes, while postbiotics can enhance gut barrier function, complementing each other to improve glucose metabolism and insulin sensitivity. This study investigated the effects of a 12-week dietary fibre (DF) supplement on gut health, metabolic function, and diet. The supplement contained konjac glucomannan (KGM), galacto-oligosaccharides (GOSs), and exopolysaccharides (EPSs) from Bifidobacterium breve. In a randomised, double-blind, placebo-controlled, parallel-group clinical trial, 53 prediabetic volunteers were randomly assigned to either a daily DF supplement (YMETA) or a placebo (cellulose microcrystalline) for 12 weeks, followed by a 4-week follow-up. Measurements included gut microbiota composition, glycated haemoglobin (HbA1c), fasting plasma glucose (FPG), plasma lipids, anthropometry, body composition, blood pressure, and dietary intake. The intervention group showed a significant increase in alpha diversity and butyrate-producing bacteria, with reductions in HbA1c and FPG levels below prediabetes thresholds. No significant changes were observed in the placebo group. This study suggests that manipulating the human gut microbiome through dietary interventions could be a promising therapeutic approach to managing prediabetes and preventing or delaying diabetes.
Research Insights
The intervention group showed a significant increase in alpha diversity and butyrate-producing bacteria, with reductions in HbA1c and FPG levels below prediabetes thresholds.
- Effect
- Beneficial
- Effect size
- Moderate
The intervention group showed a significant increase in alpha diversity and butyrate-producing bacteria, with reductions in HbA1c and FPG levels below prediabetes thresholds.
- Effect
- Beneficial
- Effect size
- Moderate