Potatoes and Blood Sugar: Can You Eat Them on a Low Glycemic Index Diet?

What if potatoes weren’t actually the problem?

Many people believe that potatoes are completely incompatible with a type 2 diabetes diet or blood sugar management. And I used to think the same: “Potatoes = forbidden on a low GI diet.”

But in reality, it’s more nuanced.

The glycemic impact of potatoes depends on several factors:

• The variety
• The cooking method
• Portion size
• Temperature (hot vs cooled)
• What you eat them with

Some preparations spike blood sugar… while others are much better tolerated.

What You’ll Learn in This Guide :

• The glycemic index of potatoes
• Which varieties to choose
• The best cooking methods
• How to reduce their glycemic impact
• How to include potatoes in a balanced diet

The goal is simple: Help you keep eating potatoes while maintaining stable blood sugar.

To understand the basics of low glycemic diets, you can consult my complete guide on the glycemic index of foods, which explains in detail the fundamental principles.

Why Do Potatoes Raise Blood Sugar?

Potatoes are rich in starch. The problem? This starch is often quickly digested.

Result:

• Blood sugar spike
• Insulin spike
• Quick hunger

BUT — this is not inevitable. Not all potato dishes have the same glycemic impact. It depends on:

• Variety
• Cooking method
• Cooling after cooking
• Overall meal composition

It is for this reason that potatoes can sometimes have a high glycemic index, but not systematically.

Glycemic Index of Potatoes

Preparation	GI
Mashed potatoes	85–90
Baked	80–90
Boiled	70–80
Steamed	65–70
Cooled	50–65

Conclusion: Preparation changes everything. Cooking and temperature can dramatically affect glycemic response.

Which Potatoes to Choose for a Low GI Diet?

Best Choices (Waxy Potatoes)

• Charlotte
• Nicola
• Roseval
• Amandine

These varieties generally contain more resistant starch, which slows the digestion of carbohydrates. Their glycemic index is often more moderate.

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Limit (Floury Potatoes)

• Bintje
• Russet
• Yukon Gold

Higher in rapidly digestible starch → stronger blood sugar spikes

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Variety	Average GI
Charlotte	55
Nicola	55
Roseval	60
Bintje	70

Cooking Changes EVERYTHING

Best Methods

Steaming

• One of the best options to reduce GI

Boiling

• Helps maintain a moderate GI

Limit

Baking

• Can increase GI, especially with long cooking

Mashed potatoes

• Highest GI (very digestible starch)

Rule: The more processed → the higher the GI

Resistant Starch: The Little-Known Trick

When potatoes cool after cooking, part of the starch becomes resistant starch.

Result:

• Slower digestion
• More stable blood sugar

This is why:

• Potato salads
• Reheated potatoes
• Meal-prepped dishes

Often have a lower glycemic impact than freshly hot potatoes.

Can Diabetics Eat Potatoes?

Yes — despite common beliefs. Potatoes are not forbidden in a diabetes-friendly diet.

But you must:

• Control portions
• Choose the right variety
• Use the right cooking method
• Balance the meal

Always pair with:

• High-fiber vegetables
• Protein (eggs, fish, meat)
• Healthy fats

Example: Eggs help slow carb absorption.

How to Reduce Glycemic Impact (Simple Method)

• Prefer steamed potatoes
• Let them cool after cooking
• Avoid very smooth mashed potatoes
• Combine with fiber and protein
• Control portion size

These strategies reduce the overall glycemic load of the meal

Balanced Meal Ideas with Potatoes

• Steamed potatoes + salmon + green salad
• Cold potato salad + eggs + vegetables
• Roasted potatoes + grilled vegetables + chicken

You can also explore low GI recipes to build balanced meals.

Gratin Dauphinois : Recette IG bas et Low Carb

Un Gratin Dauphinois adaptée aux régimes IG Bas et Low Carb, idéale pour
les diabétiques. Suivez cette recette simple et savoureuse pour régaler
vos papilles sans compromettre votre santé.

Get the Recipe

Common Mistakes

• Mashed potatoes + butter + large portion
• Eating potatoes alone
• Overcooking
• Fries / ultra-processed foods
• “It’s natural, so it’s fine” (not always true)

Why Some People Don’t Tolerate Potatoes

Some people notice:

• High blood sugar
• Quick hunger

Possible reasons:

• Sensitivity to starch
• Unbalanced meals
• Portion too large

That’s why personal testing matters.

Nutritional Benefits

Don’t forget:

• Good energy source
• Rich in potassium
• Contains vitamins

The problem isn’t the food… it’s how you use it.

Frequently Ask Question

Conclusion

Potatoes are not necessarily incompatible with a low glycemic index diet.

Their impact depends on:

• Variety
• Cooking method
• Temperature
• Overall meal balance

By choosing the right cooking methods and pairing them with fiber and protein,
you can absolutely continue eating potatoes while keeping your blood sugar stable.

Go Further

• Does a low GI diet help with weight loss?
• Dairy products on a low GI diet
• Complete beginner’s guide to low GI eating
• 10 low GI flours: how to choose and use them
• Low GI diet for type 2 diabetes: complete guide

Keep in mind: this is based on my personal experience and approach.
Explore, test, and enjoy — you’ll discover that potatoes can absolutely have their place in a healthy, balanced low GI lifestyle.

Enjoy your meals!