The Study
Low-Versus High-Glycemic Index Diets in Women: Effects on Caloric Requirement, Substrate Utilization and Insulin Sensitivity
This study gave 7 women two different diets and saw what happened to their bodies — like how much energy they burned and how their blood sugar changed. It’s like a fair test, but only with a tiny group, so we can’t say it works for everyone — just that it might work for some women like them.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
This study looked at what happens when women eat mostly low-sugar carbs instead of high-sugar carbs.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 553 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — burning more calories and fat while having lower insulin and sugar levels could help with weight management and metabolic health.
- 2Women eating low-glycemic carbs burned 11% more calories per day, used 45% of their energy from fat while fasting (vs.
- 328% on high-GI carbs), had 40% lower blood sugar and insulin, and became over 20% more sensitive to insulin.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Metabolic Syndrome and Related Disorders
Year
2007
Authors
J. Clapp, B. Lopez
Related Content
Claims (6)
In adult women, eating a low-glycemic-index diet results in 45% ± 4% of energy being derived from fat oxidation during fasting, while a high-glycemic-index diet results in 28% ± 5% fat oxidation during fasting.
Adult women who eat a low-glycemic-index diet have about 40% lower average glucose and insulin levels after meals and during fasting compared to those who eat a high-glycemic-index diet.
Adult women who eat a low-glycemic-index diet have lower levels of LDL cholesterol and leptin than those who eat a high-glycemic-index diet.
Adult women who eat a diet where 60% of calories come from low-glycemic-index carbohydrates require 11% more daily calories than those eating a diet with 60% of calories from high-glycemic-index carbohydrates.
When insulin levels remain low over time, the body reduces fat storage and increases the breakdown and use of fat for energy.
In adult women, eating foods with a low glycemic index results in a more than 20% increase in insulin sensitivity compared to eating foods with a high glycemic index, as measured by euglycemic clamp.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.