Home / friendly / plants / roots-and-tubers / Are Potatoes Keto-Friendly?

Are Potatoes Keto-Friendly?

Potatoes on a kitchen counter

Are Potatoes Keto-Friendly? The short answer is no.

Due to their high carbohydrate content, potatoes do not typically align with the strict guidelines of a ketogenic diet, which prioritizes low-carb, high-fat foods.

However, understanding the nutritional breakdown of potatoes and their impact on a ketogenic lifestyle can provide insightful information for anyone attempting to navigate this diet.

In this article, we delve into the specifics of potatoes' carbs, explore why they pose a challenge to a keto diet, and offer some creative, keto-friendly alternatives.

The goal is to provide practical guidance for those who love potatoes but also wish to maintain a ketogenic or low-carb diet.


  • Potatoes are not keto-friendly due to their high carbohydrate content.
  • Consuming potatoes can potentially knock you out of ketosis, the metabolic state key to a keto diet.
  • Despite their nutritional benefits, like vitamin C and beneficial minerals, potatoes have a high glycemic index which can be challenging for a keto diet.

Are Potatoes Keto-Friendly?

Given the nutritional profile of potatoes, it can be stated that they are not considered keto-friendly. The ketogenic diet is a low-carb, high-fat dietary plan, and the primary goal is to restrict carbohydrate intake to prompt the body into a metabolic state called ketosis.

Potatoes, being a starchy vegetable, contain a significant amount of carbohydrates. For every 100 grams, potatoes have a carbohydrate content of 15.39 grams. This figure already exceeds the recommended carb limit for a typical ketogenic diet, which usually ranges from 20 to 50 grams of carbs per day.

Furthermore, potatoes have 15.39 grams of net carbs per 100 grams serving. The term "net carbs" refers to the amount of carbs that the body can fully digest and use for energy, excluding fiber, which the body can't fully digest. This high level of net carbs makes potatoes a less than ideal choice for those following a ketogenic diet, as it can potentially knock them out of ketosis.

Can You Have Potatoes On a Strict Keto Diet?

The nature of a strict ketogenic diet requires daily carb intake to be less than 20 grams. Given that potatoes contain 15.39 grams of net carbs per 100 grams, they don't fit into this stringent carb limit. A single serving could nearly deplete the daily carb allowance on a strict keto diet, leaving little room for any other carb-containing foods.

When the allowance of daily carb intake is slightly lenient, such as in a low-carb diet where net carbs can range between 30 to 50 grams per day, potatoes might seem like a feasible option. However, even within this relaxed framework, incorporating potatoes into your diet would still consume a substantial portion of your daily carb limit.

These facts underline the importance of careful carb tracking for anyone considering including potatoes in their diet. Monitoring your macro intake precisely can provide the flexibility to include higher-carb foods like potatoes without being knocked out of ketosis. There are numerous online tools and apps available that help with tracking carbs and other macros to ensure they align with your dietary goals.

Carbs In Potatoes

The carbohydrate content in potatoes is quite significant, making them a high-carb food. Every 100 grams of potatoes contain a total of 15.39 grams of carbohydrates. To put it into perspective, if you were to incorporate a serving size of 100 grams of potatoes into your meal, you would be consuming 15.39 grams of net carbs.

The term "net carbs" refers to the carbohydrates that your body can fully digest and use for energy. This is calculated by subtracting the grams of fiber (which the body can't fully digest) from the total grams of carbohydrates. In the case of potatoes, the net carbs is also 15.39 grams per 100 grams, as the fiber content is minimal.

In addition to their high carb content, potatoes also have a high glycemic index. The glycemic index (GI) is a measure of how quickly a food can raise your blood sugar levels. Foods with a high GI can cause a rapid rise in blood sugar levels, which may not be suitable for people with certain health conditions, like diabetes.

Potatoes Nutrition Facts

Potatoes are a nutritious food that offers a number of vitamins and minerals essential for overall health. In a 100g portion, potatoes contain 77.0 kcal of energy, mostly driven by 17.49g of carbohydrates, with 15.39g being net carbs and 2.1g dietary fiber. Protein content stands at 2.05g, while total fats are quite low at 0.09g.

Potatoes carry a significant hydration factor with 79.25g of water. When it comes to micronutrients, they are rich in potassium (425.0mg), contributing to nerve function and muscle control. Sodium levels are low, at 6.0mg, making them a good option for low-sodium diets.

Among the trace minerals, iron contributes to red blood cell formation with 0.81mg, while copper (0.11mg) and manganese (0.15mg) play roles in enzymatic reactions. There are also traces of selenium (0.4ug) and zinc (0.3mg).

Potatoes are a good source of Vitamin C (19.7mg), beneficial for immune health, and contain Vitamin B-6 (0.3mg), which is important for brain development and function. Other vitamins include small amounts of Vitamin E, Vitamin K1, and several B-vitamins like Thiamin, Riboflavin, Niacin, and Pantothenic acid.

In the realm of phytonutrients, potatoes come with Lutein + zeaxanthin (9.0ug), and a hint of Beta-carotene (1.0ug), all of which are beneficial to eye health. Lastly, potatoes provide a range of essential amino acids like Leucine, Lysine, and Arginine, along with small amounts of different fatty acids.

Nutrient NameAmount and Unit per 100g
Net Carbs15.39g
Carbohydrate, by difference17.49g
Fiber, total dietary2.1g
Total fats0.09g
Sodium, Na6.0mg
Potassium, K425.0mg
Magnesium, Mg23.0mg
Calcium, Ca12.0mg
Vitamin B-60.3mg
Vitamin C, total ascorbic acid19.7mg
Vitamin E (alpha-tocopherol)0.01mg
Vitamin K12.0ug
Copper, Cu0.11mg
Iron, Fe0.81mg
Phosphorus, P57.0mg
Selenium, Se0.4ug
Zinc, Zn0.3mg
Lutein + zeaxanthin9.0ug
Manganese, Mn0.15mg
Pantothenic acid0.3mg
Folate, total15.0ug
Choline, total12.1mg
Aspartic acid0.48g
Glutamic acid0.35g
Fatty acids, total saturated0.02g
Fatty acids, total monounsaturated0.0g
Fatty acids, total polyunsaturated0.04g
Nutritional data is sourced from the US Department of Agriculture's FoodData Central system. Please see Cast Iron Keto's editorial and research standards for more information.

Health Implications of Potatoes on a Keto Diet

Including potatoes in a ketogenic diet presents a challenge due to their high carb content. Consuming potatoes can potentially knock individuals out of ketosis, the metabolic state where the body burns fat for energy instead of carbs. This is due to the fact that the significant carb content found in potatoes can easily exceed the daily carb limit set in a ketogenic diet.

Looking beyond their carb content, potatoes are packed with a variety of nutrients. They are a great source of Vitamin C, providing about 20mg per 100g serving, which is about 33% of the daily recommended intake. Additionally, they provide beneficial minerals such as potassium, magnesium, and iron. They also contain small amounts of protein and dietary fiber.

Keto-Compatible Alternatives for Potatoes

  1. Cauliflower: This versatile vegetable is a popular low-carb alternative to potatoes. It can be mashed, riced, or even roasted, making it a fitting replacement in most dishes that traditionally use potatoes. It's not only lower in carbs, but also packed with vitamins and minerals, making it a nutritious and keto-friendly option.
  2. Turnips: While slightly higher in carbs than cauliflower, turnips still have a much lower carb content than potatoes. They can be used in a similar fashion to potatoes, like in stews or casseroles, and even turned into turnip fries for a low-carb snack.
  3. Zucchini: While it doesn't share the same texture as potatoes, zucchini is another low-carb vegetable that can serve as an alternative. It can be spiralized into noodles, sliced into chips, or stuffed and baked. It's also high in vitamin C and low in calories, making it a healthy substitute.
  4. Radishes: Radishes' texture becomes tender and their flavor mellows out when cooked, making them a surprisingly good substitute for potatoes in dishes like roasts and stews. They're also low in carbs and high in vitamin C.

Concluding Thoughts on Potatoes and Keto

While potatoes are a nutritious food option, packed with a variety of vitamins and minerals, their high carbohydrate content makes them less than ideal for a ketogenic diet. Their 15.39 grams of net carbs per 100 grams serving can easily exceed the daily carb limit set in a ketogenic or low-carb diet, potentially knocking individuals out of ketosis.

However, their nutritional benefits should not be overlooked. They are a great source of Vitamin C and provide beneficial minerals such as potassium, magnesium, and iron. But, for individuals strictly following a ketogenic diet, the high carb and high glycemic index of potatoes can be challenging.

Fortunately, there are many keto-friendly alternatives to potatoes, such as cauliflower, turnips, zucchini, and radishes. These options allow for creativity in the kitchen while adhering to the dietary requirements of a ketogenic lifestyle.

Cast Iron Keto's Editorial and Research Standards

Certain rare or exotic food items may not have nutritional profiles in the FoodData Central database. If an exact match is not found in the FoodData Central database, then, the Cast Iron Keto team utilizes a three-prong approach to provide readers with the closest relevant nutritional data, where possible.

First, in the event that nutritional profiles for a rare or exotic food item is not available in the FoodData Central database, we investigate alternative names for that particular food item and use that data, when possible. Second, in cases where no alternate names exist, Cast Iron Keto will use nutritional data for a close relative or similar food item. Finally, if no close relatives or similar items exist, we refrain from publishing nutrient data tables.

When making dietary or health decisions based on FoodData Central's data, we suggest readers consult with a nutritionist or other health experts, particularly if the food in question has a significant role in your diet or if you are using the food item to treat any health disorder(s).

Furthermore, it is important to note that even if a close relative or similar item is used to approximate the nutritional data, different food items can have varying levels of nutrients due to factors such as soil quality, farming practices, and regional differences.


The information on this website is only intended to be general summary information for public use, designed for educational purposes only and is not engaged in rendering medical advice or professional services. This information does not replace written law or regulations, nor does it replace professional medical advice, diagnosis, or treatment. If you have questions about a medical condition or are seeking to evaluate the health merits of certain food items for the treatment of any medical condition, you should seek the advice of a doctor or other qualified health professionals.

The views expressed at, or through, Cast Iron Keto are for informational purposes only. Cast Iron Keto cannot guarantee the validity of the information found here. While we use reasonable efforts to include accurate and up-to-date information, we make no warranties as to the accuracy of the content and assume no liability or responsibility for any errors or omissions in the content. All liability with respect to actions taken or not taken based on the contents of this website are hereby expressly disclaimed. The content on this posting is provided "as is;" no representations are made that the content is error-free.

Frequently Asked Questions

No, due to their high carbohydrate content, potatoes are not typically suitable for a ketogenic diet.

Yes, the high carb content in potatoes can potentially exceed the daily carb limit set in a ketogenic diet, potentially disrupting ketosis.