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Are Blueberries Keto-Friendly?

Blueberries on a kitchen counter

In the quest for a healthier lifestyle, many people turn to the ketogenic, or keto, diet.

But one common question that pops up is, "Are Blueberries Keto-Friendly?" Given their nutritional attributes and delicious taste, one might hope so.

However, when diving into the specifics of a keto diet, where high-fat, moderate-protein, and low-carb meals are the norm, the situation gets a bit complicated for these vibrant berries.


  • Blueberries, while packed with nutrients, are high in net carbs, making them generally not keto-friendly.
  • Consuming blueberries in significant amounts could disrupt the state of ketosis, a key goal of the keto diet.
  • However, there are viable keto-compatible alternatives like raspberries, strawberries, blackberries, and avocados.

Are Blueberries Keto-Friendly?

Heading into the heart of the matter, let's address the question that's likely on all of our minds: Are blueberries keto-friendly? The answer, in short, is no, particularly if you're strictly adhering to a keto diet.

The ketogenic diet primarily focuses on high fat, moderate protein, and extremely low carbohydrate intake. The goal of this diet is to shift your body's metabolic state from glycolysis (burning glucose for fuel) to ketosis (burning fat for fuel). To achieve and maintain ketosis, most individuals need to limit their net carbs to around 20 to 50 grams per day.

This is where the issue with blueberries arises. Despite their small size, blueberries pack quite a punch when it comes to carbs. Per 100 grams, blueberries contain 14.57 grams of net carbs. If you consider the lower end of the daily carb allowance for a keto diet (20 grams), a single serving of blueberries could use up almost all of your daily budget.

It's also essential to consider the concept of 'net carbs', which is the total carbohydrates in a food minus the fiber content. Since fiber is a type of carb that our bodies can't digest, it doesn't raise blood sugar levels and therefore doesn't count towards our daily carb limit on keto. Blueberries do contain fiber (2.4 grams per 100 grams), but even taking this into account, their net carb content is still high for a typical keto diet.

Can Blueberries be Incorporated into a Strict Keto Diet?

Moving on to another frequently asked question: Can blueberries be incorporated into a strict keto diet? The answer requires a bit of nuance.

In essence, due to their high net carb content, blueberries are generally not recommended for a strict keto diet. As we established earlier, blueberries contain 14.57 grams of net carbs per 100 grams. Given that individuals on a strict keto diet aim to consume only 20 to 50 grams of net carbs per day, even a moderate serving of blueberries could significantly consume a large portion of this daily carb allowance.

However, this isn't to say that you should ignore blueberries entirely if you are following a strict keto diet. It's all about portion control and keeping a close eye on your daily carb intake. If you must have blueberries, a small handful should suffice so as not to exceed your daily carb limit and thus maintain ketosis.

One of the most effective ways to ensure you're staying within your daily carb limit is by tracking your food intake. This can be done using food tracking apps or even a simple food diary. These tools can help you keep a close eye on the number of net carbs you're consuming each day and ensure you're not inadvertently going overboard with carb-heavy foods like blueberries.

Delving into the Carbohydrate Content of Blueberries

Now, let's delve deeper into the carbohydrate content of blueberries. Understanding the nitty-gritty of the nutrients we consume is essential, particularly when following a diet like keto, where every gram of carb matters.

Per 100 grams, blueberries contain about 14.49 grams of total carbohydrates. However, when considering the impact on a ketogenic diet, we're more interested in 'net carbs', not total carbs. But what exactly are net carbs?

Net carbs are the count of carbohydrates that significantly impact your blood sugar level. They are calculated by subtracting the amount of fiber and, in some cases, half the amount of sugar alcohols, from the total carbs in a food.

The reason we focus on net carbs is that fiber, a type of carbohydrate, is not easily digested by our bodies and does not raise blood sugar levels or insulin. Therefore, it doesn't impact ketosis and can be subtracted from the total carbs.

So, let's crunch the numbers. Blueberries contain about 2.4 grams of fiber per 100 grams. So, if we subtract the fiber from the total carbohydrates, we end up with net carbs of approximately 14.57 grams per 100 grams of blueberries.

To give a real-world example, let's consider a handful of blueberries. A handful is approximately 68 grams, which would contain about 9.91 grams of net carbs. So, you can see how quickly blueberries can eat into your daily net carb allowance on a strict keto diet!

Nutritional Snapshot of Blueberries

Blueberries pack a plethora of nutrients in their tiny, flavorful bodies. In every 100g serving, you'll find 14.57g of carbohydrates, alongside a modest 0.31g of fats and 0.7g of protein, making them a balanced source of macronutrients.

While they're low in fat and protein, the real stars of the show are the micronutrients. Blueberries are a great source of Vitamin C, with one serving offering 8.06mg. This antioxidant plays a critical role in the body's ability to heal and maintain the health of its skin.

Another notable nutrient is potassium, standing at 85.64mg per 100g. This essential mineral plays a vital role in nerve function and muscle contraction. Additionally, the 6.18mg of magnesium present in blueberries assists in over 300 enzyme reactions, including regulating diverse biochemical reactions in the body, like protein synthesis, muscle and nerve function, and blood glucose control.

Furthermore, blueberries contain beneficial trace elements. The 0.05mg of copper aids in producing red and white blood cells, while the 0.34mg of iron helps in oxygen transportation. A serving of blueberries also provides 0.42mg of manganese, a co-factor for many enzymes that facilitate a myriad of biological processes.

Blueberries also contain 12.96mg of phosphorus, which works with calcium for robust bones and teeth, and 0.09mg of zinc, essential for immune function. The 0.11g of nitrogen and 0.3ug of biotin contribute to protein formation and healthy metabolism, respectively.

Nutrient NameAmount and Unit per 100g
Carbohydrate, by difference 14.57g
Total fats 0.31g
Protein 0.7g
Potassium, K 85.64mg
Magnesium, Mg 6.18mg
Calcium, Ca 11.69mg
Vitamin C, total ascorbic acid 8.06mg
Copper, Cu 0.05mg
Iron, Fe 0.34mg
Phosphorus, P 12.96mg
Zinc, Zn 0.09mg
Nitrogen 0.11g
Manganese, Mn 0.42mg
Biotin 0.3ug
Water 84.19g
This data was provided by the US Department of Agriculture's FoodData Central system.
'Blueberries' was not found in FoodData Central, so nutritional data for 'Blueberries, raw' was used instead under Cast Iron Keto's editorial and research standards.

Health Implications of Blueberries on a Keto Diet

Now that we've established the carbohydrate content of blueberries and their challenges with a keto diet, let's discuss the health implications of blueberries in the context of a ketogenic lifestyle.

First off, it's important to remember that the primary goal of a keto diet is to push your body into a state of ketosis. This metabolic state is achieved when your body lacks enough carbohydrates to burn for energy and starts burning fat instead. High-carb foods, like blueberries, can potentially knock the body out of this fat-burning state, making it challenging to reap the benefits of ketosis.

However, it's important not to discount the nutritional value of blueberries entirely. Blueberries are packed with powerful antioxidants, which are substances that help protect your cells against damage from harmful molecules called free radicals. Regular consumption of foods high in antioxidants, like blueberries, is linked to a lower risk of chronic conditions like heart disease and certain types of cancer.

Blueberries are also an excellent source of dietary fiber, which aids in digestion and helps maintain a healthy gut. In addition, they are rich in vitamin C, which plays a vital role in immune function and skin health, and vitamin K, which is necessary for blood clotting and bone health.

But as we've established, the high net carb content of blueberries poses a challenge for those on a strict keto diet. Therefore, while the health benefits of blueberries are undeniable, they may not be the best choice for those strictly following a ketogenic lifestyle.

Avoiding Blueberries in Your Keto Meal Plan

So, how do we go about avoiding blueberries in a ketogenic meal plan? While it might seem daunting, especially for those of us who love these little berries, there are practical ways to navigate this challenge and stay on course with our keto diet.

Firstly, awareness is a significant first step. Be conscious of the foods you are consuming and their carb content. Blueberries can often sneak into dishes you might not suspect, like salads, sauces, and even some meat dishes. By always checking the ingredients and nutritional information of the foods you eat, you can avoid accidentally consuming these high-carb berries.

Secondly, meal planning and preparation are your best friends on a keto diet. By organizing your meals ahead of time, you can ensure that you're eating foods that align with your dietary goals and avoiding those that don't. If a recipe calls for blueberries, simply omit them or substitute with a lower-carb option.

What about those blueberry cravings? This is where creativity can come into play. Instead of consuming actual blueberries, try infusing your water with a few berries for a hint of flavor. Or, experiment with blueberry extracts and flavorings that can provide that familiar taste without the carbs.

Keto-Compatible Alternatives for Blueberries

Finding that you miss the sweet tanginess of blueberries in your keto diet? Not to worry, there are several keto-compatible alternatives that can take their place without throwing you off your low-carb track.

Let's start with raspberries. Raspberries are significantly lower in net carbs than blueberries, with just 5.44 grams of net carbs per 100 grams. They can add a burst of flavor to smoothies, salads, or keto-friendly desserts. For instance, you could whip up a keto-friendly smoothie using unsweetened almond milk, a handful of raspberries, and a scoop of your preferred low-carb protein powder.

Strawberries, too, are a viable option. With just 7.68 grams of net carbs per 100 grams, strawberries can be used in a similar way to raspberries. Try them in a keto-friendly strawberry and cream dessert, using a low-carb sweetener and heavy cream.

Blackberries, with just 4.31 grams of net carbs per 100 grams, can be another great alternative. They could be used as a topping over a bowl of keto-friendly Greek yogurt, for instance.

Avocados might not be berries, but they are a fruit and are incredibly keto-friendly, with just 1.83 grams of net carbs per 100 grams. They could be used in keto desserts like avocado mousse, providing a creamy texture and plenty of healthy fats.

In comparison, blueberries, as we know, are high in net carbs with 14.57 grams per 100 grams, making them a less ideal choice for a keto diet.

Concluding Thoughts on Blueberries and Keto

As we wrap up our discussion on blueberries and the ketogenic diet, let's consolidate some of the key insights we've covered.

While blueberries are undeniably nutrient-dense, offering a wealth of antioxidants, fiber, vitamin C, and vitamin K, their high net carb content of 14.57 grams per 100 grams makes them a challenge to incorporate into a strict keto diet. Consuming them in substantial amounts could potentially disrupt the state of ketosis, the metabolic stage that the keto diet aims to achieve.

That being said, if you're a fan of these blue gems, there's no need to despair. Keto-compliant fruits like raspberries, strawberries, blackberries, and even avocados can help fill the void left by blueberries. These alternatives not only offer lower carb contents, but also provide their own unique nutritional benefits, from the antioxidant-packed raspberries to the heart-healthy fats found in avocados.

Moreover, technology can be a great ally in maintaining a keto diet. There are numerous apps available that can help track your food intake, ensuring you stay within your daily carb limit.

A unique perspective to consider is that while keto is a low-carb diet, it's not a no-carb diet. The body needs some carbs to function, and getting these from nutrient-dense sources like fruits is always a good idea. So, the occasional small handful of blueberries, while not ideal, is not a complete disaster either.

Explore our Is It Keto Knowledge Hub.

Are Berries Keto Friendly

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

Yes, blueberries are relatively high in net carbs, with 14.57 grams per 100 grams, which can be problematic for those strictly adhering to a ketogenic diet.

While blueberries are not typically keto-friendly, an occasional small handful is unlikely to derail your diet completely. However, it's important to keep track of your daily carb intake and practice portion control.

Yes, there are several. Raspberries, strawberries, blackberries, and even avocados are all lower in net carbs and can be incorporated into your keto diet in moderation.