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Keto Bodybuilding: How to Build Muscle on the Keto Diet


With keto’s reputation as a weight loss diet, you may think it’s not a good fit for other health goals — like bodybuilding or toning up.


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However, there’s a lot of interest in keto bodybuilding right now. Some bodybuilders have found that they feel great building muscle on keto and that the low-carb, high-fat diet hasn’t inhibited their muscle growth or performance at all.

Even if you don’t want to be a professional bodybuilder, there are also huge benefits to increasing your muscle mass. Muscle helps your body burn more calories, even at rest. This can make it easier to manage your weight. Increased muscle mass has also been linked to better metabolic and heart health (* , *).

Ready to muscle up? This guide to keto bodybuilding can help you get started.

Can You Build Muscles on Keto?

You can absolutely build muscle on keto.

There are just a few things your body needs to build muscle, and a high-carb diet isn’t one of them.

Still, because keto is primarily a weight loss diet, many people assume that you can’t build muscle with it.

However, ketogenic bodybuilding is a growing topic of interest. That’s why we spoke with Robert Sikes, a well-known keto bodybuilder and host of the Keto Savage podcast, to get more insights on building muscle while keto.

According to him, there are four key drivers of muscle growth:

  • Protein intake
  • Training
  • Recovery
  • Calorie intake

In the following sections, we’ll discuss how you can address each of these points to successfully build muscle on keto.

Common Keto Bodybuilding Challenges

Some of the most common keto bodybuilding challenges are not eating enough protein, not eating enough calories, and not being consistent with nutrition.

Here’s a bit more about each of these, along with some strategies to help you maximize your nutrition while building muscle on keto.

Not Eating Enough

“Many people on keto simply don’t eat enough… to elicit growth,” Sikes says.

He continues, “You need to make sure you’re eating enough total calories, or ‘fuel,’ so that your body has the energy and building blocks coming in to provide the raw materials for building more muscle tissue in the first place.”

You need to be eating at a maintenance level, or at a surplus to promote muscle growth. Use our macro calculator to calculate your needs – you can even select “gain muscle” as your weight goal and then add a custom calorie surplus. Ten percent is a good starting point.

It can be a bit of a challenge to eat enough on keto, since the low-carb, high-fat diet is so filling.

But as long as you’re hitting your protein goal, you can add additional fat to get your calories up to where they need to be.

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Low Protein

“You need to make sure that you’re eating enough protein to build and repair muscle tissue,” explains Sikes.

All the strength training in the world won’t help you build muscle if you’re not also giving your body the raw materials (amino acids from protein) it needs to actually create these new muscle tissues.

Although the average person requires just 0.8 grams of protein per kilogram of body weight, researchers have found that doubling that to 1.6 grams of protein per kilogram of weight can help optimize muscle growth. And if you’re a competitive bodybuilder, they recommend up to 2.2 grams of protein per kilogram of body weight. Here’s what that looks like for a few different weights (*):

  • 68 kilograms (150 pounds): 109-150 grams of protein
  • 80 kilograms (175 pounds): 128-176 grams of protein
  • 91 kilograms (200 pounds): 147-200 grams of protein
  • 102 kilograms (225 pounds): 163-224 grams of protein

Alternatively, you need to aim for 25% of your calories to come from protein. You can use our macro calculator help you figure this out.

Inconsistent Meal Planning

Based on the other two common mistakes (low protein, and not eating enough total calories), you can probably tell that nutrition must be dialed in for muscle growth.

But if you’re trying to follow a complicated keto bodybuilding meal plan, where you’re eating completely differently on rest days versus training days, you may find it difficult to stick to.

That’s why Sikes follows a consistent macro plan daily. “Your body is still expending quite a few calories throughout the metabolic processes required to build and repair tissue, so you don’t want to deprive your body of that nutrition on non-training days,” he says.

Instead, he bases his macronutrient intake on his goals and eats the same macros every day — whether it’s a rest day or a training day.

How to Build Muscles on the Keto Diet

Here’s our guide to building muscles on keto. The advice in this guide can help you induce muscle hypertrophy (that’s a scientific term for muscle growth), whether you’re looking to get a little stronger or enter the competitive bodybuilding scene.

Still, especially if you’re looking to compete, you will probably want to work with trainers and nutritionists who specialize in working with bodybuilders to help optimize your workouts, nutrition, and recovery.

Eat Enough Protein and Calories

Although we already discussed the importance of protein and how to calculate your protein needs above, the importance of eating enough protein simply can’t be overstated.

Protein is a necessary part of building muscle. You won’t see the results you’re hoping for without prioritizing your daily protein target.


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Here’s a list of high-protein, keto-friendly foods to help you reach your protein goal effortlessly:

  • Beef
  • Chicken
  • Turkey
  • Fish
  • Shellfish
  • Pork
  • Game meats (venison, elk, bison, duck, etc)
  • Eggs
  • Cheese
  • Peanuts
  • Almonds

Also, don’t discount protein supplements either — check out our Keto Whey Protein or Sikes’ KetoBrick. These options can be great for on-the-go meals or for getting your post-workout protein in quickly.

You also need to eat enough calories. That means eating, at minimum, at maintenance calories — but preferably at a surplus. As long as you’re sticking to your workout routine while eating at a reasonable caloric surplus, you don’t have to worry about gaining excess harmful fat.

Here’s Sikes’s advice on this subject for competitive bodybuilders.

“Make sure you spend time in a caloric surplus with emphasis on building muscle, outside of your competition prep,” says Sikes. “Balancing out the intensity of  a bodybuilding prep with a period of eating more, embracing some reasonable body fat gain, and actually capitalizing on the building phase is the yin-yang relationship that is necessary for true optimization.”

Workout Intensely

Another key part of building muscle is working out. “You need to train with enough intensity and with progressive overload principles, to subject your body to a strong enough stimulus to give it a reason to adapt,” Sikes explains, “by building more muscle.”

First, that means weightlifting. Cardio can be helpful for respiratory fitness and burning calories, but it won’t help you build muscle. If you don’t have access to weights or a gym, you get started with bodyweight strength exercises like push-ups, sit-ups, squats, and planks.

You also need to make sure that your workouts challenge you. As you get stronger, you need to increase the weight, the reps, or the sets to be sure that you’re continuously being challenged.

Finally, you need to make sure that you’re targeting each muscle group in your body, with either a full-body routine at each workout, or by targeting a certain muscle group (upper, lower, core, and back) at each workout.

This is because, although fat loss isn’t targeted, muscle growth is targeted. Strength training causes microscopic tears in your muscle tissue, and the healing process is what triggers new muscle growth. In essence, if you don’t “damage” a muscle with strength training, it will not grow (*).

Recover Well

That brings us to the next important factor for muscle growth, according to Sikes: rest and recovery.

Strength training is only half of the equation. It starts the process. However, new muscle is actually built during your rest and recovery periods.

When you’re recovering from a workout, and your body is flooded with adequate protein and calories, your body will go to work repairing the damage caused by your workout. This is what makes your muscles grow (*).

Sikes cautions that, although it may be tempting to put in the work day after day, overworking yourself is actually counterintuitive.

“So many competitors compete too frequently and spend far too much time in a deficit,” he says, “This downregulates their metabolic rate and hormonal function.”

He adds that, on rest days, “You need to ensure that you’re recovering properly and prioritizing sleep and time in the parasympathetic state.” The parasympathetic state is a nervous system state that’s sometimes nicknamed the “rest and digest” state. It’s the opposite of the sympathetic state, or “fight or flight,” and it’s necessary for your body to truly recover (* , *).

Without appropriate recovery, you won’t see the gains that you’ll expect, and you’ll probably have a hard time with workouts and sticking to your meal plan. Here are a few ways to ensure that you’re maximizing your recovery periods:

  • Get 7-9 hours of sleep each night
  • Try to reduce your stress levels
  • Engage in “active recovery” exercises like walking or light yoga

No matter how busy or excited to see results you are, recovery must be part of your process.

Stay Hydrated

Another key consideration for keto bodybuilding is your hydration and electrolyte status.

Although hydration doesn’t technically affect your ability to build muscle, being poorly hydrated can significantly inhibit your performance. And electrolytes are minerals found in your body fluid that help regulate your muscle function, like potassium, magnesium, and sodium.

On keto, your body doesn’t hold as much stored water as when you’re not on keto. Because of this, it’s important to stay on top of both your fluid intake and your electrolyte intake. You can accomplish this by drinking plenty of water each day, generously salting your food, and being intentional about including potassium- and magnesium-rich foods in your diet (* , *).

Keto-friendly potassium-rich foods include avocados, spinach, broccoli, tomatoes, and tuna. Keto-friendly magnesium-rich foods include pumpkin seeds, chia seeds, almonds, spinach, peanuts, and salmon (* , *).

Another option is to use an electrolyte supplement, like Perfect Keto Daily Electrolytes.

Supplement Smartly

Do you need any special supplements to build muscle on keto?


All you really need to do is stick to the basics we mentioned above.

Still, there are thousands of supplements on the market today that promise to help by offering explosive muscle growth. For many of these, there’s not a lot of research to support their claims.

If you choose to include supplements, some of the best to include for keto bodybuilding are:

However, remember that you don’t have to take supplements to see muscle gains.

The Bottom Line

Keto is an underrated but totally feasible diet for building muscle. You just have to make sure that you’ve got the foundations in place:


Join 90k+ people who are losing weight with Keto Kickstart, our doctor-developed program designed to give you real weight loss results.

  • Eat enough protein and calories
  • Do intense workouts with progressive overload
  • Prioritize rest and recovery with sleep, low stress, and good nutrition
  • Be mindful of your hydration and electrolyte status

These guiding principles can help you build muscle on a keto diet, whether your goal is to tone up a little bit or to compete in bodybuilding competitions.

11 References

McNab B et al. What determines the basal rate of metabolism? 2019 August 6

Burrows R et al. Low muscle mass is associated with cardiometabolic risk regardless of nutritional status in adolescents: A cross-sectional study in a Chilean birth cohort. 2017 February 1

Iraki J et al. Nutrition Recommendations for Bodybuilders in the Off-Season: A Narrative Review. 2019 June 26

Krzysztofik M et al. Maximizing Muscle Hypertrophy: A Systematic Review of Advanced Resistance Training Techniques and Methods. 2019 December 4

McGlory C et al. Skeletal muscle and resistance exercise training; the role of protein synthesis in recovery and remodeling. 2016 October 14

Tindle J et al. Neuroanatomy, Parasympathetic Nervous System. 2022 October 31

Chen J et al. Parasympathetic nervous activity mirrors recovery status in weightlifting performance after training. 2011 June

Masood W et al. Ketogenic Diet. 2022 June 11

Shirreffs S. Fluid and electrolyte needs for training, competition, and recovery. 2011

National Institutes of Health. Potassium.

National Institutes of Health. Magnesium.


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