Ketogenic Diets in Type 2 Diabetes: A Systematic Review and Meta-Analysis
Diabetes, Obesity and Metabolism
Resumen
This systematic review and meta-analysis examines the effects of very low carbohydrate ketogenic diets (VLC/KDs) on glycaemic control, lipid profiles, and weight in individuals with type 2 diabetes. The study finds some evidence of improvement in HbA1c and triglycerides but highlights the need for more robust long-term research.
Diseño del Estudio
Intervenciones
Tipo de Estudio
Resultados
Duración y Tamaño
Población del Estudio
Geografía
Metodología
This systematic review and meta-analysis followed PRISMA guidelines and included randomized controlled trials (RCTs) that evaluated the efficacy of very low carbohydrate ketogenic diets (≤50 g carbohydrate per day) in adults with type 2 diabetes or pre-diabetes. The primary outcome measured was HbA1c at 12 months. The analysis involved inverse variance weighting of mean values for continuous variables. Studies reporting on metabolic markers, lipid profiles, and body composition were included. A total of 606 participants from eight studies met the inclusion criteria. The risk of bias was assessed using the Cochrane Risk of Bias Tool. Studies varied in control diet composition, adherence rates, and duration.
Intervenciones
Participants followed very low carbohydrate ketogenic diets, defined as ≤50g carbohydrate or ≤10% total daily energy from carbohydrates. The control groups followed higher carbohydrate, low-fat diets, often calorie-restricted. Interventions varied in terms of fat and protein intake, with some studies emphasizing monounsaturated and polyunsaturated fats over saturated fats. Medication adjustments were applied variably across studies. Participants were encouraged to engage in physical activity.
Hallazgos Clave
The study found that very low carbohydrate ketogenic diets may improve glycaemic control (HbA1c reduction) and lipid profiles (triglyceride reduction) in individuals with type 2 diabetes. However, the evidence does not strongly suggest superiority over other dietary strategies. HbA1c reductions were inconsistent, and adherence to ketogenic diets may decline over time. The study recommends further well-designed, long-term studies to evaluate sustainability and clinical benefits.
Comparación con otros Estudios
Several systematic reviews and meta-analyses have evaluated the impact of very low-carbohydrate ketogenic diets (VLCKDs) on type 2 diabetes management. A 2021 BMJ meta-analysis found that VLCKDs could promote diabetes remission within six months, but benefits diminished over time due to adherence challenges. Similarly, a 2022 study in the International Journal of Environmental Research and Public Health reported improvements in body weight, HbA1c, and lipid profiles. However, a 2023 Clinical Nutrition review concluded that while ketogenic diets may enhance lipid profiles, they do not offer long-term advantages in glycemic control or weight loss compared to standard diets. Collectively, these findings suggest that VLCKDs may be effective for short-term weight and metabolic improvements, but their long-term sustainability and efficacy remain uncertain due to variations in adherence and study designs .
Referencia de la Revista
Parry-Strong A, Krebs JD. Ketogenic diets in pre-diabetes and type 2 diabetes: a systematic review and meta-analysis. Diabetes Obes Metab. 2024;XX(X):XX-XX. doi:10.1111/dom.14837
Relacionados y Discusiones
Key References
Most relevant evidence and guidance related to this research.
Supporting Evidence
Supporting evidence and related resources.
How the Ketogenic Diet Works for Type 2 Diabetes
How Different Diets Influence Your Hormones
How the Ketogenic Diet Works for Type 2 Diabetes
Benefits of Keto Diet for Diabetes
Going Keto for Diabetes? Evidence in Type 1 and Type 2 Diabetes
The Ketogenic Diet: A Detailed Beginner's Guide to Keto
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