2 low-calorie days a week could aid weight loss, blood sugar control in diabetes
Incorporating two low-calorie days per week (often referred to as intermittent fasting or the 5:2 diet) may help with weight loss and blood sugar control in people with diabetes or prediabetes, according to research. Here’s how it works and its potential benefits:
How It Works:
- 5 Normal Days: Eat a balanced, healthy diet without strict calorie restrictions.
- 2 Low-Calorie Days: Consume ~500-800 calories (varies by individual), focusing on high-protein, fiber-rich, and low-glycemic foods to stay full and maintain blood sugar stability.
Potential Benefits for Diabetes & Weight Loss:
- Improved Insulin Sensitivity – Fasting periods may help lower insulin resistance, aiding blood sugar control.
- Weight Loss – Calorie restriction promotes fat loss, which is crucial for managing type 2 diabetes.
- Lower Blood Glucose Levels – Some studies show reduced fasting glucose and HbA1c levels with intermittent fasting.
- Reduced Inflammation – May help decrease markers of inflammation linked to metabolic diseases.
Considerations & Precautions:
- Not for Everyone: People with type 1 diabetes, a history of eating disorders, or those on insulin/medications should consult a doctor before trying this, as fasting can cause hypoglycemia (low blood sugar).
- Hydration & Nutrient Balance: Stay hydrated and prioritize lean proteins, non-starchy veggies, and healthy fats on low-calorie days.
- Monitor Blood Sugar: Frequent glucose checks are important to avoid dangerous drops or spikes.
Research Support:
- A 2023 study in Diabetes Care found that intermittent fasting (including 5:2 diets) led to greater weight loss and HbA1c reductions compared to daily calorie restriction in type 2 diabetes patients.
- Another 2021 meta-analysis in Clinical Diabetes and Endocrinology suggested that intermittent fasting improved metabolic health in prediabetes and early diabetes.
The 5:2 approach may be a useful tool for weight loss and blood sugar management in some people with type 2 diabetes or prediabetes, but it should be personalized and medically supervised. Always consult a doctor or dietitian before making significant dietary changes, especially if taking diabetes medications.
Reference:
https://pmc.ncbi.nlm.nih.gov/articles/PMC8756303
https://www.sciencedaily.com/releases/2025/07/250715043351.htm
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