Evidence-informed guide Glossary

Glycaemic Index (GI) PCOS Glossary

Glycaemic index (GI): a measure of how fast a carbohydrate food raises blood glucose, and why it matters for insulin resistance in PCOS.

by Pasukan Editorial Panduan PCOS Last reviewed: 5 May 2026

Only a doctor can diagnose PCOS. This article is for education, not a substitute for medical advice.

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Why it matters for PCOS
FAQ
Sources

The glycaemic index (GI) is a 0 to 100 scale that ranks carbohydrate foods by how fast they raise blood glucose.

Why it matters for PCOS

High-GI foods such as white bread and sugary drinks raise blood sugar quickly, while low-GI foods such as oats and most legumes release glucose more slowly. Because many women with PCOS have insulin resistance, leaning towards more low-GI foods may help soften the blood sugar and insulin spikes that follow a meal.

GI is just one tool, not the whole story. Portion size, fibre, fat and protein content, and how a food is cooked all change its real effect on blood sugar. For an eating plan suited to your situation, ask a doctor or dietitian.

This glossary is education, not diagnosis. For your own situation, ask a doctor or pharmacist.

FAQ

Frequently Asked Questions

What is the glycaemic index (GI)?

The glycaemic index is a 0 to 100 scale that ranks carbohydrate foods by how fast they raise blood glucose. High values raise blood sugar quickly, while low values release it more slowly and gradually.

How does GI relate to PCOS?

Many women with PCOS have insulin resistance. Choosing more low-GI foods may help blunt blood sugar spikes after meals, though it is only one part of an overall eating pattern.

Does a low GI mean a food is automatically healthy?

Not necessarily. GI only measures the blood sugar effect, not calories, fat, or portion size. Some high-fat foods have a low GI but still need to be eaten in moderation.

Sources

Thomson RL et al.. The effect of a hypocaloric diet with and without exercise training on body composition, cardiometabolic risk profile, and reproductive function in overweight and obese women with PCOS. American Journal of Clinical Nutrition. 2010.PubMed