What Happens to Your Body When You Eat a Protein Bar Every Day (2024)

"Depending on the brand and ingredients, protein bars can be a great source of nourishment and convenience for many people, including working professionals, athletes and more," says Sarah Schlichter, M.P.H., RDN, a registered dietitian at Bucket List Tummy. "They can provide necessary nutrients, like protein, iron, calcium, fiber, and some also provide caffeine for a pick-me-up. Furthermore, they can meet dietary preferences, such as gluten-free, vegan and plant-based."

Benefits of Protein Bars

They're a Quick and Easy Protein Source

Protein bars are a quick protein fix for when you're on the go. When you're pressed for time, protein bars can help fuel your body with essential amino acids, support muscle repair and keep hunger at bay. Just toss one in your bag, and you're ready to conquer your day.

"Protein bars can be a great and easy source of shelf-stable protein to include in your diet," says Schlichter. "Keep them in your purse, office or car for a pick-me-up when needed."

They May Improve Blood Sugar Control

"Protein bars can pair well with carbohydrate foods and snacks, improving blood sugar control. For example, pairing a protein bar with a piece of fruit is a great example of a balanced snack that can help keep blood sugar steady and stable. Also, according to an older 2014 study, stable blood sugar translates to sustained energy and can also boost cognitive function," notes Schlichter. The study referenced by Schlichter was published in the journal Age.

Some protein bars are designed with a balanced ratio of protein, carbs and fiber, which can slow the release of sugar into your bloodstream, preventing those energy-draining spikes and crashes, per a 2022 review in Foods.

3. They're Convenient

Whether you're dashing from meetings to the gym or juggling a hectic schedule, protein bars couldn't be easier to keep on hand. Slip them into your desk drawer, gym bag or car for a satisfying and hassle-free snack whenever and wherever you need it.

"Protein bars are a convenient post-workout option with no prep time that can help initiate recovery from a workout," says Schlichter. "Ideally, you want a blend of carbohydrates and protein post-workout to help your muscles recover, and many protein bars can provide this in a portable package, with many different flavors and textures to choose from."

Potential Downsides and Precautions

While protein bars offer undeniable convenience and valuable nutrients, there are some potential downsides and precautions to consider. Some protein bars may contain added sugars that could affect blood sugar levels. Additionally, not all bars are created equal when it comes to ingredient quality, so it's essential to read labels carefully. Keep an eye on artificial additives, high saturated fats and excessive calorie counts, as some bars might lean in these directions.

"Many protein bars can be high in sugars or sugar alcohols, which can irritate some people and lead to gastrointestinal distress and discomfort," cautions Schlichter. "Make sure to look at the ingredient list to identify total sugars and sugar alcohols, which will be listed under total sugars. Some examples of sugar alcohols are xylitol, erythritol, sorbitol and maltitol."

While protein bars have a time and place and can be helpful for many reasons, they can also inadvertently become a crutch for convenience. Relying too heavily on protein bars as meal replacements can lead to not eating whole foods at mealtimes and potential nutrient imbalances.

Other Protein-Rich Foods to Eat

Fortunately, there's a wealth of other protein-rich foods to explore, from lean meats like chicken and turkey to plant-based options such as tofu, tempeh, nuts, seeds and legumes like beans and lentils. Eggs, dairy products and fish are excellent protein sources offering unique nutritional benefits. Incorporating a wide variety of high-protein whole foods into your diet can help ensure you get a more comprehensive range of nutrients, supporting your overall health and wellness.

The Bottom Line

Protein bars are quick and easy snacks that pack significant nutrition and calories per serving. While protein bars can be enjoyed regularly, consuming them as meal replacements or as your primary protein source isn't recommended. Pay close attention to nutrition labels, as many protein bars contain added sugars, saturated fats and other low-nutrient ingredients. Focus on eating a balanced and nutritious diet that includes a variety of high-protein foods, such as lean meats, eggs, tofu, legumes, nuts and seeds.