Written by Dr. Albana Greca Sejdini, MD, MMedSc, Family Physician
Medically reviewed by Dr. Ruden Cakoni, MD, Endocrinologist
Last reviewed: July 2026
Low glycemic load foods provide a relatively small calculated glucose impact in the portion eaten. Glycemic load, or GL, combines a food’s tested glycemic index with the grams of available carbohydrate in a serving. A GL of 10 or less is classified as low, 11–19 as medium, and 20 or more as high. Beans, lentils, intact barley, appropriately portioned oats, many whole fruits, plain yogurt, and nonstarchy vegetables can help create lower-GL meals. However, serving size, food preparation, the complete meal, medicines, and your individual response still matter.
Glycemic load can make carbohydrate planning more practical because it considers both carbohydrate quality and quantity. Glycemic index tells us how the available carbohydrate in a tested food performed under standardized conditions. Glycemic load adds the amount of available carbohydrate in the portion you intend to eat.
That does not make GL a perfect predictor. The same food may affect two people differently, and even the same person may respond differently depending on portion size, cooking, ripeness, meal composition, activity, sleep, stress, and diabetes treatment. Use GL as one planning tool—not as a promise of a particular blood glucose result.
Glycemic load estimates the glycemic effect of a stated serving of a carbohydrate-containing food. It uses two pieces of information:
A food can have a high GI but a low GL if the normal portion contains little available carbohydrate. A lower-GI food can produce a medium or high GL when the serving is large. This is why the phrase “low glycemic load food” is incomplete unless the serving size is also clear.
GL = GI × available carbohydrate in the serving ÷ 100
The calculation applies to one defined portion.
| GL per serving | Classification | General meaning |
|---|---|---|
| 10 or less | Low GL | Relatively low calculated glycemic impact from that portion |
| 11–19 | Medium GL | Intermediate calculated impact |
| 20 or more | High GL | Relatively high calculated impact |
A commonly used example is an apple with a tested GI of 40 and 15 grams of available carbohydrate in the stated serving:
40 × 15 ÷ 100 = GL 6
This example is in the low-GL range. It should not be applied to every apple without qualification because variety, size, ripeness, and the carbohydrate value used can differ.
| Question | Glycemic index | Glycemic load |
|---|---|---|
| What does it describe? | The tested glycemic quality of a food’s available carbohydrate | The estimated impact of a stated portion |
| Does it include serving size? | No | Yes |
| Low range | 55 or less | 10 or less per serving |
| Main limitation | Does not show how much is eaten | Depends on an accurate GI, carbohydrate value, and portion |
For a broader explanation, see our guide to carbohydrates, glycemic index, and diabetes. You can also compare specific foods in the glycemic load chart.
The GL of an exact product can vary. The foods below are practical starting choices that can often fit lower-GL meals when portions are appropriate.
Leafy greens, broccoli, cauliflower, peppers, tomatoes, cucumber, zucchini, eggplant, mushrooms, asparagus, cabbage, and green beans.
Lentils, chickpeas, kidney beans, black beans, cannellini beans, split peas, and edamame. They provide carbohydrate, fiber, and protein.
Berries, apples, pears, oranges, peaches, plums, cherries, and other whole fruits in suitable portions. Juice usually delivers carbohydrate more quickly.
Intact barley, steel-cut or rolled oats, bulgur, quinoa, and some dense whole-grain or sourdough breads. GI can vary greatly by product and preparation.
Plain yogurt and milk can fit planned portions. For nondairy products, compare added sugar, total carbohydrate, protein, calcium, and vitamin D.
Nuts, seeds, eggs, fish, poultry, tofu, and unprocessed lean meat contain little carbohydrate. Choose them for nutrition and meal balance, not because of a GL score alone.
International GI tables show that legumes, many fruits, dairy products, and pasta are often low GI, while breads, breakfast cereals, rice, and potatoes vary widely. “Whole grain” does not guarantee a low GI or low GL, particularly when a grain has been finely milled or the portion is large.
Imagine a food with a GI of 50. Its GI remains 50, but its calculated GL increases as the available carbohydrate portion increases:
| GI | Available carbohydrate | Calculated GL | Category |
|---|---|---|---|
| 50 | 10 g | 5 | Low |
| 50 | 20 g | 10 | Low |
| 50 | 30 g | 15 | Medium |
| 50 | 40 g | 20 | High |
This is a mathematical illustration, not a table for one particular food. It shows why doubling the carbohydrate portion approximately doubles the GL even though the food’s tested GI has not changed.
This follows the same structure as our updated diabetes plate method and meal-planning guide. If you use insulin or need precise carbohydrate targets, the carbohydrate counter may be more useful than GL alone.
| Instead of | Try more often | Why it may help |
|---|---|---|
| Sugary cereal | Measured oats with plain yogurt, berries, and nuts | More fiber and protein; less added sugar |
| Large white-rice serving | Smaller rice portion plus lentils and vegetables | Reduces the refined-starch portion and adds fiber |
| Fruit juice | Whole fruit and water | Whole fruit retains fiber and is easier to portion |
| Large bread-only meal | One appropriate bread portion with vegetables and protein | Improves balance and reduces total carbohydrate |
| Sweetened yogurt | Plain yogurt with berries or cinnamon | Usually contains less added sugar |
A 2021 systematic review and meta-analysis of 29 randomized trial comparisons involving 1,617 people with diabetes found that lower-GI or lower-GL dietary patterns produced a modest improvement in HbA1c compared with higher-GI or higher-GL control diets. Smaller improvements were also reported for several cardiometabolic measures.
This evidence supports low GI/GL eating as one useful option within diabetes nutrition therapy. It does not prove that every low-GL product improves health, that GL alone prevents complications, or that everyone will lose weight. Weight change still depends on energy intake, food quality, activity, medicines, sleep, health conditions, and other factors.
Claims that low-GL foods will prevent cancer, eliminate cravings, guarantee weight loss, or provide unlimited energy are too strong. A lower-GL pattern should complement—not replace—appropriate diabetes medicine, physical activity, sleep, blood pressure and cholesterol care, and medical follow-up.
If your healthcare plan includes home monitoring, you can compare similar meals rather than reacting to one isolated reading:
Do not use GL to diagnose diabetes. Laboratory fasting glucose, HbA1c, or an oral glucose tolerance test is used for diagnosis. Our guide to blood sugar levels by time of day can help you understand why the timing of a reading matters.
A sudden reduction in carbohydrate can increase the risk of low blood sugar if insulin, sulfonylureas, or meglitinides are not adjusted appropriately. Do not reduce carbohydrate sharply or change medicine doses without a plan from your healthcare professional.
A low-GL diet is not necessarily ketogenic. If you take an SGLT2 inhibitor, discuss very-low-carbohydrate or ketogenic diets with your prescriber because they may increase the risk of ketoacidosis.
Kidney disease may require individualized protein, potassium, phosphorus, sodium, or fluid limits. Pregnancy and childhood require enough energy and nutrients for growth. Gastroparesis may require changes in fiber, fat, meal size, and insulin timing. A registered dietitian experienced in diabetes can adapt the plan safely.
I recommend using glycemic load as a practical clue, not as the only rule for choosing food. Start with vegetables, fiber-rich carbohydrates, adequate protein, realistic portions, and minimally processed foods. Then use your glucose pattern and treatment plan to personalize the meal.
Useful options often include nonstarchy vegetables, lentils, beans, chickpeas, intact barley, measured oats, many whole fruits, and plain yogurt. The exact GL depends on the food, tested GI, available carbohydrate, and portion.
No. A low-carbohydrate diet restricts carbohydrate intake. Glycemic load combines carbohydrate amount with GI. A meal can contain nutritious carbohydrate and still have a moderate overall GL when portions are balanced.
GL can be more practical because it includes portion size. However, it depends on having a reliable GI and an accurate carbohydrate value. Neither GI nor GL replaces carbohydrate counting, nutrition quality, or personal glucose monitoring.
No. A large serving increases carbohydrate and calories and can raise the meal’s GL. Portion size remains important even when the food’s GI is low.
Plain meat, fish, eggs, and oils contain little or no carbohydrate, so GI and GL are generally not meaningful measures for them. Choose these foods based on protein needs, fat quality, calories, sodium, and overall health.
No. It can be one useful part of diabetes management, but it does not cure type 1 or type 2 diabetes. Continue prescribed treatment and regular medical follow-up.