The glycemic index (GI) is an essential indicator used to understand how foods affect blood sugar levels.

Some foods cause a rapid rise in blood sugar, while others lead to a slower and more gradual increase.

Understanding the glycemic index of foods helps you make better dietary choices, especially if you want to stabilize your blood sugar, lose weight, or adopt a low glycemic index diet.

In this complete guide, you will discover:

• what the glycemic index is
• the difference between glycemic index and glycemic load
• a glycemic index food table
• which foods to prioritize in a low GI diet
• common mistakes to avoid

You will also be able to download a complete glycemic index table to help you better organize your daily meals.

What is the Glycemic Index (GI)?

The glycemic index (GI) is a measure that indicates how quickly a carbohydrate-containing food raises blood sugar levels after it is consumed.

It is expressed on a scale from 0 to 100, using glucose as the reference point (GI = 100).

The higher the glycemic index of a food, the faster it increases blood sugar levels.
Conversely, foods with a low glycemic index cause a slower and more gradual increase in blood sugar.

Glycemic Index vs Glycemic Load: What’s the Difference?

The glycemic index measures the quality of carbohydrates, but not the quantity consumed.

Glycemic load (GL), on the other hand, takes into account the actual portion eaten, providing a more accurate picture of a food’s impact on blood sugar levels.

In everyday practice, prioritizing low glycemic index foods remains a simple and effective way to stabilize blood sugar levels.

Glycemic Index Food Table

The glycemic index classifies foods according to their impact on blood sugar levels.
Foods are generally grouped into three categories:

Category	Glycemic Index
Low GI	below 55
Moderate GI	between 55 and 70
High GI	above 70

Low GI foods lead to a slower rise in blood sugar and are usually preferred in a balanced diet.

Here is a short extract from the glycemic index table:

Food	Glycemic Index
Lentils	30
Chickpeas	35
Apple	38
Plain yogurt	35
Basmati rice	50
Oat flakes	55
White bread	75

To access the complete glycemic index table, you can download the guide below.

Glycemic Index of Fruits

Fruits naturally contain sugars, but their glycemic index varies depending on their fiber content and composition.

Examples of low glycemic index fruits:

• apples
• pears
• cherries
• strawberries
• raspberries

Some fruits have a higher glycemic index, such as:

• watermelon
• pineapple
• very ripe bananas

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Glycemic Index of Vegetables

Most vegetables have a low glycemic index, which is why they play a central role in a low GI diet.

Examples include:

• broccoli
• zucchini
• eggplant
• spinach
• green beans

However, starchy vegetables may have a higher glycemic index, such as:

• potatoes
• sweet potatoes depending on cooking method

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Glycemic Index of Grains and Breads

Grains can have very different glycemic impacts depending on how they are processed.

For example:

• white bread: high GI
• whole grain bread: moderate GI
• sourdough bread: lower GI
• basmati rice: moderate GI
• quinoa: low GI

If you want to learn more, check out my complete guide to low glycemic index flours.

Why Adopt a Low Glycemic Index Diet?

Following a low GI diet is not only about controlling blood sugar.
It is a broader nutritional approach that improves metabolic stability and energy balance.

Main benefits of a low GI diet include:

More Stable Blood Sugar

Low GI foods cause a gradual rise in blood sugar levels, preventing sudden spikes followed by energy crashes.

Fewer Cravings and Snacking

Rapid blood sugar fluctuations stimulate hunger. Reducing these fluctuations helps control appetite.

Better Weight Management

Stable blood sugar improves hormonal balance, particularly insulin regulation, which may support weight loss or weight maintenance.

More Consistent Energy

Avoiding blood sugar “spikes and crashes” helps maintain stable energy levels throughout the day.

Foods to Prioritize in a Low GI Diet

Adopting a low GI diet does not mean restricting your food choices.
It simply means making smarter selections within each food category.

1. Vegetables (Very Low to Low GI)

Most vegetables have a very low glycemic index because they contain few carbohydrates and are rich in fiber.

Examples:

• zucchini
• spinach
• broccoli
• green beans
• eggplant
• lettuce
• peppers
• cauliflower

These foods form the ideal base of a low GI meal.

2. Low GI Fruits

Most fresh fruits have a moderate to low GI, especially when eaten whole rather than as juice.

Recommended fruits include:

• apples
• pears
• berries
• grapefruit
• kiwi
• apricots

Eating fruits whole helps preserve their natural fiber.

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3. Legumes

Lentils, chickpeas, kidney beans, and split peas have a low glycemic index and are rich in fiber and plant protein.

They are an excellent alternative to refined carbohydrates.

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4. Whole Grains

Whole grains have a more moderate glycemic impact than refined versions.

Examples:

• basmati rice
• quinoa
• bulgur
• oats
• barley

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5. Low Glycemic Index Flours

Some flours allow you to cook while limiting the glycemic impact.

Examples:

• almond flour
• coconut flour
• buckwheat flour
• whole spelt flour

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6. Proteins and Healthy Fats

Proteins (eggs, fish, meat, tofu) and healthy fats (olive oil, nuts, avocado) have a minimal impact on blood sugar levels.

They also slow down carbohydrate absorption when combined with low GI foods.

Foods to Limit or Avoid in a Low GI Diet

Some foods should be eaten in moderation due to their rapid impact on blood sugar.

Refined Grain Products

• white bread
• baguette
• toast biscuits
• white pasta
• white rice

Refining removes much of the fiber, accelerating carbohydrate absorption.

Sugary Products

• industrial pastries
• sodas
• candy
• sugary breakfast cereals

These foods often have a high glycemic index.

Certain Potato Preparations

Potatoes can have a highly variable GI depending on cooking methods.
Baked potatoes, mashed potatoes, and fries often have a higher GI.

Sugary Drinks

Fruit juices and sodas cause rapid increases in blood sugar because they lack the fiber of whole fruit.

A low GI diet does not mean total restriction, but rather better awareness of choices and portions.

7-Day Low Glycemic Index Meal Plan Example

Here is a simple weekly structure.

📅 Day 1
Breakfast: Oat porridge with berries
Lunch: Lentil salad with grilled vegetables and soft-boiled egg
Dinner: Salmon, steamed broccoli, and quinoa

📅 Day 2
Breakfast: Plain yogurt with chia seeds and apple
Lunch: Grilled chicken, green beans, and basmati rice
Dinner: Quiche Lorraine and green salad

📅 Day 3
Breakfast: Crepes made with barley flour
Lunch: Chickpeas, roasted eggplant, and salad
Dinner: Cod, zucchini, and bulgur

📅 Day 4
Breakfast: Sourdough whole-grain bread with almond butter
Lunch: Quinoa salad with avocado and crunchy vegetables
Dinner: Ground beef, sautéed vegetables, and lentils

📅 Day 5
Breakfast: Berry smoothie with protein
Lunch: Buckwheat galettes with vegetables
Dinner: Roasted chicken, boiled sweet potato, and salad

📅 Day 6
Breakfast: Cottage cheese and nuts
Lunch: Red lentil curry
Dinner: Grilled fish and steamed vegetables

📅 Day 7
Breakfast: Homemade low GI muffins
Lunch: Mixed salad (eggs, vegetables, seeds)
Dinner: Vegetable soup and sourdough whole-grain bread

If you want a structured and detailed program with precise recipes, quantities and practical advice, also discover my complete 7-day program adapted to type 2 diabetes.

Common Mistakes in a Low GI Diet

Confusing Low GI with Low Calories

A low GI food is not necessarily low in calories.

Ignoring Portions

Even low GI foods can raise blood sugar if consumed in large amounts.

Forgetting Meal Balance

Combining carbohydrates with proteins and healthy fats slows sugar absorption.

Focusing Only on the Glycemic Index

The overall quality of the diet remains essential: fiber, micronutrients, and food diversity matter.

List of Low Glycemic Index Foods

Low GI Vegetables

• broccoli
• zucchini
• spinach
• eggplant
• peppers

Low GI Fruits

• apple
• pear
• berries
• peach
• plum

Low GI Grains

• quinoa
• barley
• buckwheat
• basmati rice

How to Reduce the Glycemic Index of a Meal

• add fiber
• add protein
• choose whole grains
• avoid refined sugars

Frequently Asked Questions