Can You Eat Sugar While Bulking? (Complete Guide)

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You have heard that sugar is an easy way to add calories to your diet when you want to gain weight for physique or performance goals.  However, you worry that added sugar can have drawbacks in terms of health.

So, can you eat sugar while bulking?  Yes, you can eat sugar while bulking.  A moderate amount of sugars can be a great way to add the extra calories needed for a calorie surplus to gain weight.  As well, eating sugar at the right times can assist in workout performance and recovery.

With that said, there’s many different types of sugars, and whether it’s okay or not to consume during a bulk largely depends on how much you eat and your overall nutrition.  

In this article, I will cover: 

  • Common types of sugar 
  • The impacts of sugar on body composition 
  • The best time to eat sugar when bulking
  • Potential drawbacks of eating sugar and strategies to overcome them

At the end, you will have a thorough understanding and a complete guide to eating sugar while bulking.

Common Types of Sugar

At the most basic level, sugars are a subset of carbohydrates and therefore one of the key macronutrients along with protein and fat.  

Carbohydrates are considered either simple or complex, depending on the length of the molecule.  Sugars are called “simple carbs” or “quick carbs” and split into monosaccharides (containing one molecule) or disaccharides (containing two molecules).   


Carbohydrates with only one (mono) molecule are called monosaccharides.  Because they only have one molecule they cannot be broken down any further and are absorbed directly into the bloodstream.  This is where the name “quick carbs” comes from. 

Monosaccharides includes:


Glucose is the most abundant monosaccharide.  It is made by plants and it is the most important source of energy for ALL organisms.  Glucose is naturally occurring in fruits and vegetables and it can also be refined and added to other products.  


Fructose is another naturally occurring monosaccharide in honey, fruits, flowers, berries and root vegetables.  It is also manufactured commercially from corn and sugarcane.  


Galactose is the final dietary monosaccharide and its name means “milk sugar.”  It is commonly found in the disaccharide lactose (see below) and is found in dairy products, avocados, and sugar beets.


Carbohydrates with two molecules are called disaccharides.  They are combinations of the monosaccharides above.  

Disaccharides include:

Sucrose (glucose + fructose)

Sucrose is produced naturally in plants and is extracted from sugarcane or sugar beet to be refined into white sugar or what is commonly known as table sugar.  It is this refined sugar that has a poor reputation for its link to health problems.

When you eat naturally-occuring sugars in their original plant form, you are also getting fiber, water, small amounts of other macronutrients (protein and fat), and other micronutrients.  It is the refining process that strips all of these elements away leaving only the pure sugar, devoid of other nutrients, that causes people to call these “empty calories.”  

But, there is a place for these calories in a bulking diet, without fear of displacing other nutrients.  How and when to include added sugar will be covered later.

Lactose (glucose + galactose)

Lactose is the natural form of sugar found in milk and other dairy products. 

Maltose (glucose + glucose)

Maltose is also known as malt sugar.  It is formed when grains germinate (sprout) and is part of the fermentation process for certain alcohols including malt liquors and beer.

Other Names for Sugar

Beyond the six forms of sugar above, there can be dozens of different names for sugar.  Seeing “ose” at the end of a word is often a clue that it’s describing something that is a form of sugar or starch.  Dextrose, maltose, and mannose are examples.

Sugar can also be added via a sugar-containing food like honey, maple syrup, or molasses. 

Sugar is also added to foods via “nectars”, juices, or syrups:

  • Agave nectar
  • Brown rice syrup
  • Coconut nectar
  • Concentrated white grape juice
  • Corn syrup / HFCS high-fructose corn syrup 
  • Evaporated cane juice 
  • Tapioca syrup

Many products, especially those marketed as “natural” or “organic” will use several of these sweeteners in combination.  

Keep in mind that ingredients are listed in order by volume.  While no one sweetener might be near the beginning of the list, adding them together could mean that sweeteners in total are one of the most abundant ingredients.

This can help you identify added sugars on food labels and give you ideas of how you can add sugars to your diet while bulking.

Key Takeaway: Regardless of the type or source, like any other carbohydrate, sugar provides four calories per gram.  These calories are very helpful in achieving the calorie surplus needed for a bulk.

Is Sugar Okay For Bulking?

Yes, sugar is very helpful for bulking because it provides an easy, inexpensive source of calories that can be easily consumed and digested in a low volume of food.

When gaining weight it is a good idea to focus on foods that are calorie-dense, meaning that they provide a high number of calories for a small amount of food. This will allow you to eat more food without feeling uncomfortably full. 

Sugar is absorbed quickly into the bloodstream with minimal digestive effort.  This decreases satiety and also the thermic effect of eating (the calories expended to digest food).  These two factors are very helpful for a calorie surplus.

Sugar also dissolves easily in liquids, meaning it can be easy to consume as part of a drink.  Drinking calories can be easier and less demanding than trying to chew and eat calories from solid foods during or immediately after a workout.  I’ll cover sugar and workouts, next.

Does Sugar Affect Muscle Growth or Recovery?

Does sugar affect muscle growth or recovery?

Sugar is a common ingredient in sports recovery drinks like Gatorade, and for good reason: sugar consumption blunts cortisol, the hormone that is released in times of stress, such as the training stress from a hard workout.  

Cortisol has catabolic effects, meaning it breaks down muscle tissue.  So, “turning off” cortisol by ingesting sugar puts the brakes on breaking down muscle tissue.  

At the same time, ingesting sugar prompts the pancreas to secrete insulin.  Insulin is a key hormone for allowing the uptake of nutrients into cells.  This allows the sugar in the bloodstream to replenish stored carbohydrates (glycogen) in the muscles and liver.  

It also allows protein (broken down into amino acids in the bloodstream) to be used for muscle protein synthesis (building new muscle tissue).  

This is why we generally recommend a ratio of 2:1 carbs to protein for intra- (during exercise) and post-workout nutrition.  For extremely strenuous sessions, this can be as much as 4:1 carbs to protein.

Key Takeaway: sugar has a beneficial role to play in both muscle growth and recovery, by blunting cortisol to stop muscle breakdown and prompting the insulin response for nutrient uptake to replenish stored glycogen and build new muscle tissue.

Does Sugar Cause Fat Gain?

Gaining weight is a matter of energy balance, that is to say, looking at the total number of calories coming in from the foods you eat, compared to the total number of calories going out from activity and exercise. It does not matter whether the calories coming in are from foods with or without sugar.

This means that excess calories from any source can contribute to fat gain, but also to muscle gain.

Usually, the goal with bulking is to maximize muscle gain and minimize fat gain.  The process of muscle gain is not 100% efficient, which means that at least some portion of weight gain from a calorie surplus will be adipose tissue (fat), and some will be lean body mass/fat-free mass (muscle).

In general, the weight gain experienced from a calorie surplus is 33-40% fat-free mass and 60-67% fat gain.  This means that for every 5lbs gained, 3lbs would be fat and 2lbs would be muscle.  This is helpful information to have in terms of expectations for a bulking cycle.

The top predictor of fat-free mass gain is the anabolic signal created by resistance training.  This means training hard enough, long enough, and often enough to elicit adaptations in the body – the training response.  A progressive resistance training program is generally the best source of this stimulus.  

Further, a study at California State University showed that the weight gain and fat-free mass gains experienced during a resistance training program while taking high-calorie supplements were essentially the same regardless of the source of the calories in those supplements.  

It is important to note that protein intake has to be adequate to allow for muscle protein synthesis.  This was a minimum of 15% of dietary intake coming from protein.

Key Takeaway: a caloric surplus, combined with an appropriately challenging resistance training program, produces the highest increases in fat-free mass.  Sugar on its own does not result in higher fat gain than the fat gain from other surplus calories.

How Much Sugar Can You Have If You’re Bulking?

The American Heart Association recommends limiting added sugars to no more than 6 tsp (25g) per day for women and 9 tsp (36g) for men.  

However, the World Health Organization (WHO) suggests a limit of no more than 5-10% of total daily energy intake coming from added sugars.  For an individual who is bulking and consuming 4,000 calories per day, this would mean 200-400 calories, or 50-100g of added sugar (up to 25 tsp).

It is important to keep in mind that these guidelines were developed when considering health for the general population, and not necessarily with the needs of performance athletes in mind.  

Individuals looking to gain mass and exercising intensely, as recommended above to maximize muscle gain, may need to exceed these recommendations for sugar intake.

Overall, it is recommended that endurance athletes consume a high-carbohydrate diet of 8-10g of carbohydrate per kg of body weight per day, noting that a high-carbohydrate diet may be necessary for optimal adaptations to training.  A range of 5-7g/kg/day is recommended for general training needs.

Key Takeaway: Our recommendation is 30-45g of sugar during each hour of intense training, and 30-45g of sugar post-workout.  Limit added sugars to 25g (women) or 36g (men) on non-training days.

For lower-sugar options on non-training days, check out: 

Best Time To Eat Sugar When Bulking

best time to eat sugar when bulking

The best time to eat sugar while bulking is during (intra) and immediately after (post) workout.

As stated previously, we generally recommend a ratio of 2:1 carbs to protein for intra- (during exercise) and post-workout nutrition. 

During intense training sessions lasting an hour or more

Make or buy a workout drink that has 30-45g of quick-digesting carbohydrates (check out these products: dextrose, glucose or maltodextrin, which are common choices) and 15g of protein (such as whey isolate) in 500-600mL of water for each hour of workout time. 

A 2:1 glucose to fructose carb makeup is ideal during exercise.  Sip on this steadily during exercise.

These simple sugars in water are recommended during exercise.  Whole food sources are not generally practical nor well-tolerated, as it’s hard to chew and swallow solid foods while exercising, and this often leads to digestive distress.

For post-workout nutrition

As above, make or buy a workout drink that has 30-45g of quick-digesting carbohydrates and 15g of protein (such as whey isolate) in 500-600mL of water.

Delaying post-workout nutrition by as little as a few hours decreases muscle glycogen storage and protein synthesis.  The “window of gains” (also called the “anabolic window”) is open widest immediately post-workout when the body is primed to most effectively and efficiently use nutrients.  

Insulin sensitivity is highest at this time, meaning the body is quick to respond to the hormone and take nutrients from the bloodstream into the cells.

Most workout or energy drinks available on the market contain either carbs or protein in water, but not both.  

Easy solutions: 

Ready-made protein drinks generally do not have 2:1 carbs to protein on their own.  One possibility is Orgain Organic Nutritional Shake (16g of protein and 32g of carbs including 11g of added sugar), but it also has 7g of fat added.

Key Takeaway: The best time to eat sugar is during and/or immediately after strenuous exercise, ideally resistance training.

Consequences of Eating Too Much Sugar While Bulking

We saw that sugar does not have a negative impact on body composition compared to surplus calories from other sources.  So, this means that any negative effects are limited to psychological and/or physiological impacts such as the possibility of “sugar addiction,” decline in certain health markers, and displacing other nutrients in the diet.

Sugar Addiction

The current research is unclear as to whether sugar is truly addictive in the way that nicotine or certain illicit drugs can be addictive, with dangerous withdrawal effects when consumption is stopped.  

However, sugar and high-calorie foods in general do produce increases in the “feel-good” chemical dopamine – a “reward” in the brain.  After repeated exposure to the same food, the same level of dopamine is no longer released, meaning that larger and/or more frequent servings are required to get the same reward. 

The risk is that eating more added sugar during a bulk will condition the brain and body to want more and more sugar, which can be especially hard to manage when returning to maintenance calories or switching to a calorie deficit for a cut. 

However, most of these studies looked at hyperpalatable foods – foods with a combination of high sugar AND high fat, and often added salt, as well, rather than sugar by itself.  

You’ll notice that we DO NOT recommend including sugar in a bulking diet in the form of cookies, cakes, chocolate bars, and other foods that are easy to overeat. 

Related Articles:

Key Takeaway: Stick to the recommended format (sugar powder added to water) at the recommended times (during and after strenuous exercise) and focus on an overall balanced diet of minimally processed whole foods the rest of the time to mitigate the risk of “sugar addiction” to hyperpalatable processed foods.

Health Markers

Too much added sugar is linked to negative health outcomes including:

Key Takeaway: Regular exercise, as recommended during a bulking phase, is preventive and offsets the health risks associated with higher sugar intake.  Reminder: a calorie surplus combined with resistance training produces the highest increases in muscle mass.

Dietary Displacement

A final concern when it comes to added sugar is that these “empty calories” will push out (displace) calories coming from sources that provide more micronutrients.  

For example, drinking sugar-sweetened water instead of a piece of fruit will not provide the fiber and micronutrients in the fruit.  

This is a legitimate concern during a cut, when restricting calories to achieve a deficit means that eating sugar would require not eating another source of carbs such as a whole food like an apple.  

However, during a bulk, the extra calories from sugar are additive and do not replace whole food sources of carbohydrates such as fruits (e.g. mango, oranges, grapes), vegetables (e.g. yams) and whole grains (e.g. rice, oats, barley, wheat, rye).

Key Takeaway: Dietary displacement of key micronutrients due to added sugar during a bulk is not a concern when the excess calories are in addition to an overall balanced diet of minimally processed whole foods.

Is Artificial Sweetener Better Than Sugar While Bulking?

No, artificial sweetener is not better than sugar while bulking.  Artificial sweeteners do not provide the calories needed to achieve a calorie surplus for mass gain and they do not provide fuel for energy during exercise or to replenish muscle glycogen stores after exercise.

Rules To Follow When Eating Sugar During A Bulk

rules to follow when eating sugar during a bulk

Step 1: Determine Calorie Needs

Determine your calorie needs for bulking. Use an easy online calculator like this one. Input your age, sex, height, current weight and activity level and press Calculate.  

For example, a 34-year old 175lbs male who is 5’10” and trains intensely 6-7 times per week has 3,000 calories for maintenance. 

Add 10-20% calories to that total for bulking, e.g. 300-600 calories for a daily total of 3,300-3,600 calories.

In order to log your calories accurately, I recommend using the app Macro Factor. This calorie counting app has the largest verified food database, making it a very accurate resource to use when you are counting your calories. Use this link and enter the code FEASTGOOD when signing up to get an extra week on your free trial (2 weeks total). You can cancel anytime before your trial ends without being charged.

Step 2: Determine Macronutrient Needs

Determine how many of the total calories will come from each of the macronutrients: protein, carbohydrates (including sugar), and fat.  


We saw that protein intake needs to be at least 15% of total calories for adding muscle mass. 

A general guideline for athletes is to consume 1.2 – 2.2 grams of protein per kilogram of body weight, or up to 1 gram of protein per pound of body weight per day.  In the case of desired mass gain, this can be based on goal body weight as opposed to current body weight.  Protein ideally can provide up to 35% of total daily calories. 

For example:

  • A 175lbs male who would like to weigh 225lbs should eat 225 grams of protein per day, providing 900 calories (25% of 3,600). 
  • An hour of intense training would include 15g during the workout and 15g after the workout, leaving 195g of protein to consume during the rest of the day.
  • If there are five meals/snacks outside of the training window, this is an average of 39g of protein at each meal or snack.


Carbohydrates are the body’s preferred source of energy.  For general training needs, we saw the recommended range of 5-7g of carbohydrates per kilogram of body weight per day.  This is in keeping with the guidelines that an active person would look to have ~40-60% of calories coming from carbohydrates.  

For example:

  • A 175lbs male who would like to weigh 225lbs should eat 475 grams of carbohydrates per day, providing 1,900 calories (53% of 3,600). 
  • An hour of intense training would include 30-45g of sugar during the workout and 30-45g of sugar after the workout, leaving 385-415g of carbohydrates to consume during the rest of the day.
  • If there are five meals/snacks outside of the training window, this is an average of 77-83g of carbohydrates at each meal or snack.
  • Note that this is nearly exactly 2x the 39g of protein for each meal or snack, lining up with our recommendation of 2:1 carbs to protein.  That article includes 8 meal examples.  


The remaining calories for the day come from fats.  At a minimum, fat intake should be at least 20% of total calories, especially for hormonal health for women.  If this minimum is not met, reduce carbohydrate intake so that minimum fat intake can be met.

For example:

  • A 175lbs male who would like to weigh 225lbs eats 3,600 calories per day
  • 900 from protein (225g); 25% of total calories
  • 1,900 from carbohydrates (475g); 53% of total calories
  • 800 from fat (89g); 22% of total calories

Related Article: 4000 Calorie Bodybuilding Meal Plan & Diet (Printable)

Step 3: Consider Added Sugar Relative to Carbohydrates

Deduct the sugar from the training drinks to determine the carbohydrate needs from whole food sources for the remainder of the day.  

As we saw in the example, the added sugar in drinks during and after training can still be accommodated within the carbohydrate total for the day. 

On non-training days, limit added sugars to a maximum of 25g (women) and 36g (men).

High-calorie carbohydrate sources without sugar:

  • Dried fruit
  • Whole grain
  • Pasta
  • Fruit
  • Potatoes
  • Yams
  • Carrots

Step 4: Prepare Workout Drinks

Plan and shop for the necessary ingredients for your intra- and post-workout drinks, including the carb and protein powders noted. Preparation is key.  It’s why we have the saying:  

“Failing to plan is planning to fail.”

These drinks are 30-45g of carbs and 15g of protein in 500-600mL of water.  A ratio of 2:1 glucose to fructose was considered ideal, but a single source carb powder is also perfectly reasonable.

Step 5: Train Hard & Prosper

Follow your planned progressive resistance training program.  This provides the stimulus for your body to increase muscle mass, when supported by proper nutrition.  Fuel during and replenish after your workouts with your prepared workout drinks.

Step 6: Track & Assess Progress

Give yourself time to implement your new way of eating and to see the results.  

Set a regular interval to weigh yourself and to take measurements and photos, if physique change is important to you.  

Keep track of your performance in the gym if mass gain is desired for improved performance.

If you are eating the higher amount of calories but not seeing the progress you want, it’s possible that the original estimate of your maintenance calories was too low, and/or your new higher intake is allowing you to train more intensely and thereby burn more calories.  

This means you need to eat even more to achieve an energy surplus for mass gain. Add more calories and repeat steps 2-6 again. 

Final Thoughts

Added sugars have a key role to play in assisting optimal adaptations to training for increased muscle mass.  These carbohydrates play a key role in muscle growth and recovery.  They are an inexpensive and easy source of calories to achieve a calorie surplus during a bulk.  

What To Read Next

Learn more about whether these high sugar foods are good or bad for bodybuilding:


Jacobs, K. A., & Sherman, W. M. (1999). The Efficacy of Carbohydrate Supplementation and Chronic High-Carbohydrate Diets for Improving Endurance Performance. International Journal of Sport Nutrition, 9(1), 92-115. Retrieved Aug 4, 2023, from

Burke, L.M., Cox, G.R., Cummings, N.K. et al. Guidelines for Daily Carbohydrate Intake. Sports Med 31, 267–299 (2001).

DiNicolantonio, J. J., Lucan, S. C., & O’Keefe, J. H. (2016). The Evidence for Saturated Fat and for Sugar Related to Coronary Heart Disease. Progress in cardiovascular diseases, 58(5), 464–472.

Cornelissen, V. A., & Smart, N. A. (2013). Exercise Training for Blood Pressure: A Systematic Review and Meta‐analysis. Journal of the American Heart Association, 2, e004473.

Frøsig, C., & Richter, E. A. (2012). Improved Insulin Sensitivity After Exercise: Focus on Insulin Signaling. Obesity, 20(12), 2317-2323.

Helms, E.R., Aragon, A.A. & Fitschen, P.J. Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation. J Int Soc Sports Nutr 11, 20 (2014).

Phillips, Stuart & Moore, Daniel & Tang, Jason. (2007). A Critical Examination of Dietary Protein Requirements, Benefits, and Excesses in Athletes. International journal of sport nutrition and exercise metabolism. 17 Suppl. S58-76. 10.1123/ijsnem.17.s1.s58.

Lambert CP, Frank LL, Evans WJ. Macronutrient considerations for the sport of bodybuilding. Sports Med. 2004;34(5):317-27. doi: 10.2165/00007256-200434050-00004. PMID: 15107010.

Matthew S. Tryon and others, Excessive Sugar Consumption May Be a Difficult Habit to Break: A View From the Brain and Body, The Journal of Clinical Endocrinology & Metabolism, Volume 100, Issue 6, 1 June 2015, Pages 2239–2247,

ARNY A. FERRANDO and others, Inactivity Amplifies the Catabolic Response of Skeletal Muscle to Cortisol, The Journal of Clinical Endocrinology & Metabolism, Volume 84, Issue 10, 1 October 1999, Pages 3515–3521,

Joosen, A.M., Westerterp, K.R. Energy expenditure during overfeeding. Nutr Metab (Lond) 3, 25 (2006).

Slater, G. J., Dieter, B. P., Marsh, D. J., Helms, E. R., Shaw, G., & Iraki, J. (2019). Is an Energy Surplus Required to Maximize Skeletal Muscle Hypertrophy Associated With Resistance Training. Frontiers in nutrition, 6, 131.

About The Author

Lauren Graham

Lauren Graham is a Precision Nutrition Level 1 certified nutrition coach. She focuses on helping busy professionals balance healthy eating and purposeful movement.  Lauren has a background in competitive swimming and is currently competing as a CrossFit athlete.  She has a passion for training, teaching, and writing. 

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