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Are Sweet Potatoes Keto-Friendly?

Sweet Potatoes on a kitchen counter

Are Sweet Potatoes Keto-Friendly? The answer, simply put, is no.

The high carbohydrate content of sweet potatoes takes them off the menu for those adhering to a strict keto diet.

But don't worry, that doesn't mean you have to give up on delicious meals.

In this article, we'll give a full breakdown of the carb content of sweet potatoes and discuss why they don't quite fit into the keto mold.

We'll also delve into the overall health implications of incorporating sweet potatoes into a keto diet.

Plus, we'll explore some tasty, keto-friendly alternatives to keep your diet diverse and exciting.

So, let's dive in and take a closer look at sweet potatoes in the context of a keto diet.


  • Sweet potatoes and keto? Unfortunately, they're not a match. The high carbohydrate content, with 17.12g of net carbs per 100g, makes sweet potatoes unsuited for a strict ketogenic diet.
  • Despite their health benefits, including providing ample dietary fiber, vitamin A, vitamin C, and potassium, sweet potatoes could make it difficult to maintain ketosis due to their high carb content.
  • Sweet potatoes' high glycemic index can cause a rapid spike in blood sugar levels, another reason they're less suited for a keto diet.

Are Sweet Potatoes Keto-Friendly?

Sweet potatoes, despite their numerous health benefits, are not considered keto-friendly. The defining metric of a keto-friendly food is its low carbohydrate content, and unfortunately, sweet potatoes do not meet this guideline.

Diving into the nutritional data, each 100g serving of sweet potatoes contains 17.12g of net carbs, which is significantly higher than the daily carb limit set by most keto diets. Net carbs refer to the total amount of digestible carbohydrates in a food, excluding fiber. Since the ketogenic diet typically allows for only 20-50g of carbs per day, a single serving of sweet potatoes could potentially take up most, if not all, of a day's carb allowance.

Can You Have Sweet Potatoes On a Strict Keto Diet?

In a strict ketogenic diet, where the daily net carb limit is typically set at below 20g, consuming sweet potatoes may not align with these guidelines. A single serving of sweet potatoes, which contains 17.12g of net carbs, almost meets the entirety of this allowance, leaving very little room for other food sources throughout the day.

Even for those following a less strict regime, such as a low-carb diet where the daily limit extends to about 30-50g of net carbs, incorporating sweet potatoes could still prove challenging. Given that sweet potatoes carry a substantial amount of carbs, their inclusion in a daily meal plan would severely limit the intake of other carb-containing foods, which may not be feasible or nutritionally sound.

Carbs In Sweet Potatoes

Sweet potatoes pack a significant carbohydrate punch. Each 100g serving contains 17.12g of net carbs. As a reminder, net carbs are the total carbs minus the dietary fiber. These are the carbs that are absorbed by the body, raising blood sugar levels, which is a critical consideration for those following a ketogenic diet.

Also, it's important to note that sweet potatoes have a medium to high glycemic index, which measures how rapidly a food increases blood sugar levels. Foods with a high glycemic index, such as sweet potatoes, can cause a quick spike in blood sugar levels. This is another reason why sweet potatoes may not be suitable for a keto diet, as maintaining stable blood sugar levels is a key aspect of this dietary lifestyle.

Sweet Potatoes Nutrition Facts

Sweet potatoes are dense in nutrients, providing an array of both macro and micronutrients in a 100g serving. They offer 86.0kcal and significant amounts of carbohydrates — 20.12g in total, with 17.12g being net carbs and 3g dietary fiber. Despite their low protein content of 1.57g, sweet potatoes contribute a rich mix of essential amino acids such as Leucine, Methionine and Valine among others.

One of the unique aspects of sweet potatoes is their high Beta-carotene content, amounting to 8509.0ug per 100g serving. Beta-carotene is converted into Vitamin A in our bodies, with the sweet potato providing a remarkable 709.0ug of this crucial nutrient that supports eye health.

Other than this, sweet potatoes are a source of several essential vitamins, including Vitamin B-6, C, E, and K1. They also provide vital minerals like Potassium (337.0mg), Calcium (30.0mg), Magnesium (25.0mg), and Iron (0.61mg). Additionally, they offer a variety of B-Vitamins such as Thiamin, Riboflavin, and Niacin, along with Folate and Choline.

Sweet potatoes also contain a low level of total fats (0.05g), with traces of total saturated, monounsaturated, and polyunsaturated fatty acids. The sodium content is moderate at 55.0mg, and the water content is considerable at 77.28g per 100g, contributing to their juicy texture.

Nutrient NameAmount and Unit per 100g
Net Carbs 17.12g
Carbohydrate, by difference 20.12g
Fiber, total dietary 3.0g
Total fats 0.05g
Protein 1.57g
Sodium, Na 55.0mg
Potassium, K 337.0mg
Magnesium, Mg 25.0mg
Calcium, Ca 30.0mg
Vitamin A 709.0ug
Vitamin B-6 0.21mg
Vitamin C, total ascorbic acid 2.4mg
Vitamin E (alpha-tocopherol) 0.26mg
Vitamin K1 1.8ug
Copper, Cu 0.15mg
Iron, Fe 0.61mg
Phosphorus, P 47.0mg
Selenium, Se 0.6ug
Zinc, Zn 0.3mg
Beta-carotene 8509.0ug
Manganese, Mn 0.26mg
Thiamin 0.08mg
Riboflavin 0.06mg
Niacin 0.56mg
Pantothenic acid 0.8mg
Folate, total 11.0ug
Choline, total 12.3mg
Calories 86.0kcal
Water 77.28g
Tryptophan 0.03g
Threonine 0.08g
Isoleucine 0.06g
Leucine 0.09g
Lysine 0.07g
Methionine 0.03g
Cystine 0.02g
Phenylalanine 0.09g
Tyrosine 0.03g
Valine 0.09g
Arginine 0.06g
Histidine 0.03g
Alanine 0.08g
Aspartic acid 0.38g
Glutamic acid 0.16g
Glycine 0.06g
Proline 0.05g
Serine 0.09g
Fatty acids, total saturated 0.02g
Fatty acids, total monounsaturated 0.0g
Fatty acids, total polyunsaturated 0.01g
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 Sweet Potatoes on a Keto Diet

Including sweet potatoes in a keto diet poses a particular challenge, mainly due to its high carbohydrate content. The main goal of a ketogenic diet is to enter a state of ketosis, where your body burns fat for fuel instead of carbs. Consuming sweet potatoes, which are high in carbs, could potentially disrupt this state, making it more difficult to stay in ketosis.

However, it's worth noting that sweet potatoes are packed with various essential nutrients. They are an excellent source of vitamin A, providing more than 700 micrograms per 100g serving. In addition, they offer a good amount of dietary fiber, vitamin C, and potassium, among other nutrients.

Keto-Compatible Alternatives for Sweet Potatoes

  1. Cauliflower: Versatile and low in carbs, cauliflower can be a great alternative to sweet potatoes. It can be riced, mashed, or roasted, and used in various recipes. A 100g serving of cauliflower contains just about 5g of carbs, considerably lower than the 17.12g found in sweet potatoes.
  2. Butternut Squash: While higher in carbs than cauliflower, butternut squash still has less than sweet potatoes, with approximately 12g per 100g serving. It can provide a similar texture and slightly sweet flavor when roasted or mashed, making it a decent alternative for certain dishes.
  3. Zucchini: This vegetable is another low-carb choice, with a mere 3g of carbs per 100g serving. It's not as sweet as a sweet potato, but it can be used in various ways, including being spiralized into "noodles," sliced and grilled, or diced and sautéed.
  4. Turnips: With about 6g of carbs per 100g serving, turnips can also serve as a substitute. They can be roasted, mashed, or used in stews, offering a texture similar to sweet potatoes but with fewer carbs.

Concluding Thoughts on Sweet Potatoes and Keto

The crux of our exploration into sweet potatoes and their place in a ketogenic diet boils down to this: despite their nutritional benefits, sweet potatoes' high carb content makes them unsuitable for a strict keto diet. Each 100g serving packs 17.12g of net carbs, which could take up a substantial portion of your daily carb limit on a keto diet.

Sweet potatoes offer ample dietary fiber, vitamin A, vitamin C, and potassium, but these benefits may be offset by their high carbohydrate content, especially for those following stringent low-carb diets like keto. The high glycemic index of sweet potatoes, which may lead a rapid rise in blood sugar levels, is another factor that makes them less suitable for a keto diet.

The good news is, there's no shortage of keto-friendly substitutes for sweet potatoes. Options like cauliflower, butternut squash, zucchini, and turnips can fill the void left by sweet potatoes in your meals, offering a variety of textures and flavors while maintaining a low-carb profile.

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, sweet potatoes are high in carbs which makes them unsuitable for a strict keto diet.

Yes, they are rich in dietary fiber, vitamin A, vitamin C, and potassium, but these benefits are offset by the high carb content for those on a keto diet.