Why Do Protein Bars Make You Fart? - Chief Nutrition (2024)

Updated: Mar 26, 2024Veronika Larisova

Protein bars have become ubiquitous in the fitness and health industry, offering a convenient and seemingly nutritious option for those on the go. Packed with protein, they promise to help build muscle, satisfy hunger, and support weight management.

However, protein barsare often also responsible for another, less glamorous side effect: bloating and excessive flatulence.


The Gut Microbiome

To understand why protein bars may cause digestive discomfort,we need to delve into the world of the gut microbiome. The human digestive system is home to trillions of microorganisms that play a vital role in our overall health. These microbes help break down food, extract nutrients, and maintain a balanced gut environment. When the balance of gut bacteria is disrupted, digestive issues, including bloating and gas, can occur.


Ultra-Processed Ingredients

One significant factor contributing to the digestive discomfort associated with protein bars is the use of ultra-processed ingredients. Artificial thickeners, fillers, preservatives, colours, flavours, sweeteners andseed oils are all terrible for your gut health. Here's what to look out for:

  • Vegetable and seed oils including anything labeled as “vegetable oils” or “hydrogenated”, Canola oil, Corn oil, Cottonseed oil, Soy oil, Sunflower oil, Safflower oil, Grapeseed oil and Ricebran oil.
  • Thickeners, fillers and preservatives like Calcium Carbonate, Carrageenan, Cornstarch, Glycerin, Magnesium Silicate, Magnesium Stearate, Maltodextrin, Methylcellulose, added Nitrates and Nitrites, Potassium Sorbate, Potassium Carbonate, Shellac, Silicon Dioxide, Sodium Benzoate, Soy Lecithin, Soybean Oil, Sulfites & Titanium Dioxide.
  • Sweeteners and Sugar alcoholslike Aspartame, Sucralose, Sorbitol, Maltitol, Mannitol and Erythritol.These ingredients can disrupt the balance of gut bacteria and lead to gas and bloating. Additionally, they can cause diarrhoea and other digestive issues in sensitive individuals.Erythritol, a sugar alcohol commonly found in protein bars, is known for its laxative effect. While it's considered safe for most people when consumed in moderation, excessive consumption of erythritol can lead to gastrointestinal upset, including gas and bloating.
  • Artificial colours and flavours that are listed as a number, like E129. A heads up that companies can claim that their products contain no artificial colours and flavours, as long as they have the same DNA as natural sources, but they’re not sourced from nature.


Protein Powders: Whey vs Plant vs Collagen

Whey protein, derived from milk, is a popular choice in protein bars due to its high biological value and complete amino acid profile. However, somepeople may experience digestive distress when consuming whey protein, especially if they are lactose intolerant or sensitive to dairy products.

Plant-based protein powders, such as pea, rice, or soy protein, are also commonly used in protein bars. While they are suitable alternatives for those with dairy sensitivities, they can still lead to digestive discomfort in some individuals, particularly if the protein source is poorly tolerated.

Collagen protein, like we use in our Collagen Protein Bars, actively supports gut health.


Insufficient Fibre Content

Another reason why protein bars may cause bloating is their typically low fibre content. Fibre isimportant for maintaining a healthy digestive system, as it aids in regular bowel movements and promotes the growth of beneficial gut bacteria. The lack of sufficientfibre in protein bars can slow down digestion and contribute to bloating.

Our Collagen Protein Bars have a great serve of fibre.


Overconsumption and Portion Control

One common mistake people make with protein bars is overconsumption. These bars are often marketed as healthy snacks, but they can be calorie-dense. Eating too many at once can overwhelm your digestive system, leading to bloating and gas.

Our Collagen Protein Bars are nutrient dense and will fill you up fast so you won't feel like overeating!


Conclusion

Protein bars may offer a convenient source of nutrition and protein for those with busy lifestyles, but they can also come with the unwanted side effect of bloating and excessive flatulence. The culprits often include the use of ultra-processed ingredients like erythritol, as well as protein powders like whey or plant-based alternatives. Additionally, artificial sweeteners and lowfibre content can further contribute to digestive discomfort.

To minimise these issues, it's essential to choose protein bars wisely, paying attention to ingredient lists, portion sizes, and your own digestive sensitivities. Ultimately, maintaining a balanced diet that includes a variety of whole foods will not only support your fitness goals but also promote better gut health and reduce the risk of digestive discomfort associated with protein bars.

This is why we created our Collagen Protein Bars - high protein, low carb, gut friendly and won't make you fart ;)

Why Do Protein Bars Make You Fart? - Chief Nutrition (2024)

FAQs

Why Do Protein Bars Make You Fart? - Chief Nutrition? ›

The culprits often include the use of ultra-processed ingredients like erythritol, as well as protein powders like whey or plant-based alternatives. Additionally, artificial sweeteners and low fibre content can further contribute to digestive discomfort.

Why do I fart after eating protein bars? ›

The Bottom Line

Protein bars often contain compounds called sugar alcohols, which are lower in calories than traditional sugars. Sugar alcohols are associated with multiple gastrointestinal side effects including abdominal pain, bloating, and gas.

Why do I feel weird after eating a protein bar? ›

Thickeners are added to food to improve texture. They can cause gut inflammation, bloating, and gas and lead to the development of various inflammatory illnesses when consumed daily. Thickeners commonly used in protein bars include carrageenan, xanthan gum, gum Arabic, agar-agar, and modified starches.

What happens if you eat too many protein bars? ›

Excessive protein intake, often found in protein bars, can strain the kidneys and liver, leading to long-term health complications. Moreover, the inclusion of added sugars or artificial sweeteners can disrupt blood sugar levels, contribute to sugar cravings, and negatively impact gut health.

Are protein bars hard to digest? ›

Unfortunately, there are a handful of ingredients in protein bars that your gut might not love. “The isolated fibers and sugar alcohols added to many bars can be problematic because they can be digested or fermented by bacteria in the gut and cause bloating and gas,” says Kissane.

Is protein supposed to make you gassy? ›

Eating too much protein can cause nausea, bloating, gas, constipation and dehydration. If you are only focused on loading up on protein, you might be neglecting other nutritious foods. Be sure to eat a balanced plate of all food groups and include fruits, veggies, healthy fats, whole grains and protein.

Is it okay to eat a protein bar every day? ›

A closer look at the ingredients and sugar levels in some of these bars can make you question whether they're a good idea to eat every day. While there's no problem with the occasional sugary snack or 'unhealthy' treat, eating certain types of protein bars every day might be problematic long term.

Are protein bars good for weight loss? ›

Yes, low carb protein bars can be useful to a weight loss regimen. High in protein and fiber while low in carbohydrates, they can promote satiety and help you feel full longer, potentially reducing overall calorie intake. However, they should be consumed as part of a balanced diet and exercise program.

Are protein bars inflammatory? ›

Protein bars seem like they should effectively replace a meal and keep you moving without slowing you down, but be wary of the ingredients. "Lots of protein bars and ladened with added sugars, making them really inflammatory," says Marissa Meshulam, MS, RD, CDN.

Are Quest bars actually healthy? ›

Generally speaking, yes, Quest Protein Bars are healthy. They come with a very low sugar load (1g), reasonable calorie count (190), and fairly robust fiber content to boot (13g). It's a solid hold-me-over snack between meals, or right after a workout when your body is craving nourishment.

Are protein bars laxative? ›

Erythritol, a sugar alcohol commonly found in protein bars, is known for its laxative effect. While it's considered safe for most people when consumed in moderation, excessive consumption of erythritol can lead to gastrointestinal upset, including gas and bloating.

Why do protein bars make me gassy? ›

"The issues are not usually with the protein itself, but other items protein supplements may contain." She explains that many protein powders and bars can contain sugar substitutes and/or sugar alcohols (xylitol and mannitol) that commonly cause gas.

Which protein bars won't cause gas? ›

Popular Brands and Their Ingredients

Some popular brands that offer protein bars with easily digestible protein sources include RxBar, Larabar, and Quest Nutrition. These brands have gained popularity for their commitment to using high-quality ingredients that are gentle on the digestive system.

What protein is hardest to digest? ›

Any meats that are tough or fibrous may be hard to digest. These include: meats with casings, such as hot dogs, sausage, and kielbasa. lunch meats.

What are the side effects of protein bars? ›

You may find that getting such a high amount of protein from a processed source makes you feel sluggish or nauseous. You may also find that the artificial sweeteners and/or sugar alcohols found in many protein bars cause unpleasant side effects, like headaches.

Can I eat protein bars on an empty stomach? ›

Yes, you can take protein bars on an empty stomach.

Since they are easily digestible, they can provide a quick source of energy. However, some people might find it heavy and prefer to eat something lighter. It ultimately depends on individual preferences and digestive systems.

Do Quest protein bars make you gassy? ›

Many Quest Bars contain sugar alcohols like maltitol, which can cause digestive issues like bloating, gas, and diarrhea. According to registered dietician Andy De Santis, “Sugar alcohols can also interfere with blood sugar control and may lead to weight gain.” That's right, zero calorie sweeteners can make you fat.

Why does protein make you lose weight? ›

In general, dietary protein increases energy expenditure because it has a markedly higher DIT than fat and carbohydrates, and it preserves REE by preventing lean mass loss. Furthermore, increased DIT increases satiety, which also contributes to weight loss.

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