Are Meal-Replacement Bars Healthy?

Key Takeaways:

• Meal-replacement bars can be healthy if they’re high in protein and fiber and low in calories and sugar.

• Protein bars can provide nutritious, quick meals, help you maintain muscle as you lose weight, and keep you feeling full.

• Meal-replacement bars from Hers are designed for people taking weight loss medication. They help you get the nutrients you need as you work toward your weight loss goals.
  

Are meal-replacement bars healthy? They can be — but it depends on what’s in them and how often you reach for them.

The best meal-replacement bars for weight loss are packed with protein, fiber, and essential nutrients, making them convenient and healthy when you’re on the go. Others? Not so much.

We’ll walk you through the health benefits of meal-replacement bars and the best ingredients to look for — as well as which to avoid — so you can snack smarter.

Meal-replacement bars can be healthy. The ones high in protein, fiber, and vitamins are nutritious options.

They’re not all made equal, though. Other bars are loaded with added sugars, artificial ingredients, and fillers that might do more harm than good.

Plus, despite the name, meal-replacement bars shouldn’t replace all your meals. You still need to eat whole foods.

When Are Meal-Replacement Bars Healthy?

So then, when (or how often) should you eat meal replacement bars? If you’re reaching for high-protein, low-sugar meal-replacement bars about once a day, they can be a healthy addition to your diet.

Not to mention, if you’re juggling a busy lifestyle, having a quick, healthy option to fill you up makes it easier to stay on track with your goals.

“Protein shakes and bars are also portable,” says Mike Bohl, MD, licensed physician and senior director of medical content & authority at Hims & Hers.

This means you can have a healthy meal or snack in your gym bag or desk drawer, or even on the go. “Pack some shakes or bars with you in a bag,” suggests Dr. Bohl.

Benefits of meal-replacement bars include:

• Building muscle

• Boosting metabolism

• Reducing hunger

• Curbing food cravings

Here’s why meal-replacement bars might be worth including in your weight loss plan.

They Can Help Build and Maintain Muscle

You’ve probably heard it before: Protein is key for muscle growth. Combining strength training — like bodyweight exercises or weight lifting — with a protein-rich diet can help you build and maintain lean muscle while losing fat.

In other words, protein bars can be good for folks working on weight loss who want to make sure they don’t lose too much muscle in the process.

→ Get started: Strength Training for Beginners

They May Boost Metabolism

Maintaining or building muscle is crucial because muscle burns more calories than fat, even at rest.

The more muscle you have, the more calories your body naturally burns, making weight loss and weight maintenance easier.

They Could Help Curb Appetite

Protein can help keep you full longer. If you can’t get enough protein from food, high-protein meal-replacement bars can top up your intake.

Some bars are high in fiber, which can also keep you feeling fuller for longer.

With your appetite in check, you might find it easier to stick to healthy portion sizes and avoid overeating at other meals.

They Might Control Cravings

Protein might help quiet cravings for unhealthy foods. One study found that eating a high-protein breakfast can reduce food cravings more than a breakfast with a typical amount of protein.

So, having a protein bar for breakfast might stave off cravings later in the day. This is ideal if you usually skip breakfast or don’t have much time in the mornings.

Meal-Replacement Bars Can Support a High-Protein Diet

High-protein diets have been linked to reduced belly fat. Eating things high in protein regularly may even help prevent weight regain after initial weight loss.

What actually constitutes a high-protein diet? The Dietary Guidelines for Americans (DGA) recommend 46 grams of protein a day for women and 56 grams for men. But aiming for more may provide even more noticeable weight loss benefits.

Craig Primack, MD, obesity physician and senior vice president of weight loss at Hims & Hers, recommends getting about 100 grams of protein per day to support weight loss.

Meal-replacement bars that are high in protein can help you reach that target.

→ Learn more: How Much Protein to Eat for Weight Loss

Possible downsides of meal-replacement bars include adding extra calories, sugar, and artificial ingredients to your diet — and potentially gastrointestinal issues.

Here’s what to know if you’re considering meal-replacement or protein bars for weight loss.

They Can Add Extra Calories

If you’re aiming to lose weight, staying in a calorie deficit — burning more calories than you consume each day — is key.

Some protein bars, especially high-calorie ones, can push you over your target, slow weight loss progress, or cause weight gain over time.

This is especially true if you’re eating them as a snack instead of as a true meal replacement — and if you’re not making other lifestyle changes, like doing more movement.

→ Crunch your numbers: Hers Calorie Deficit Calculator

They Might Have Added Sugars and Other Artificial Ingredients

Some meal-replacement and energy bars are packed with extra sugars and refined carbs, which can contribute to weight gain over time.

To avoid this, look for bars with natural ingredients, minimal added sugars, and a good amount of fiber to balance blood sugar levels.

They May Lack Essential Nutrients

Not all meal-replacement bars are loaded with essential nutrients that support overall health.

If you’re lowering your calorie intake for weight loss, choose bars with a solid range of vitamins and minerals to help meet your daily needs.

They Could Give You Gastrointestinal Issues

Having too much protein and fiber — particularly processed versions — can make you feel gassy and bloated. If you’re sensitive to these, start slowly and see how you feel before making meal-replacement bars a regular part of your routine.

Here’s how to pick a meal-replacement bar that actually supports your health and weight loss goals.

1. Pick Your Protein Wisely

Not all protein is created equal. Here are some common types you’ll find in meal-replacement bars:

• Whey protein. Whey is a fast-digesting dairy protein linked to increased lean muscle mass. It’s a good source of essential amino acids (“the building blocks of protein”).

• Casein protein. Casein is a slower-digesting dairy protein that helps keep you full longer. It’s also a good source of essential amino acids.

• Soy protein isolate. Soy is a complete plant-based protein with all the essential amino acids.

• Pea protein. Pea protein isolate is an excellent plant-based option that may help with appetite control.

• Hemp and brown rice protein. Hemp and brown rice are other plant-based options often used together to create a complete amino acid profile.

• Collagen protein. Collagen usually comes from bovine (cow) sources and might be good for skin health. It doesn’t contain all the essential amino acids.

Some of these types of proteins are plant-based, while others are from animal products. If you eat a plant-based diet, pea or soy protein might be your best bet.

→ Related: Types of Protein Powder and How to Choose

2. Look for Other Nutrients

A solid meal-replacement bar should do more than just provide protein — it should help fill nutritional gaps. Look for bars with:

• Fiber. Make sure it has at least 3 to 5 grams of fiber to help regulate blood sugar levels, support digestion, and keep you full.

• Healthy fats. Look for unsaturated fats and ingredients containing healthy fats, like nuts, seeds, or coconut.

• Essential vitamins and minerals. These are especially important if you’re replacing a nutritious meal. Make sure the bar has a good balance of micronutrients like iron, calcium, and B vitamins.

3. Be Mindful of Sugar and Artificial Additives

You might say some protein bars are just candy bars in disguise. While they may sound tasty, they could be sneaking in substantial sugar content and not much protein.

To avoid these, watch out for:

• Added sugars. Things like corn syrup, cane sugar, agave, brown rice syrup, or honey can cause blood sugar spikes.

• Artificial preservatives and additives. Stuff like artificial flavors, colors, and non-nutritive sweeteners don’t bring any nutritional value. But they may help keep calories low while preserving taste.

• Sugar alcohols (like xylitol and maltitol). These might cause bloating and digestive discomfort for some people.

It’s also wise to choose low-calorie meal-replacement bars if you’re trying to lose weight. Look for ones that have between 150 and 250 calories per bar.

Meal-replacement bars can be good for you when you’re on weight loss medication — there are a few reasons why.

First, when losing weight — whether you’re taking weight loss medication or not —  there’s a risk you’ll lose some muscle. “One of the best ways to help protect against this is by eating enough protein,” says Dr. Bohl.

Second, protein can help regulate hunger and cravings, making weight loss easier and your medication more effective.

Finally, weight loss medications like GLP-1 (glucagon-like peptide-1) receptor agonists — think Ozempic^® and Wegovy^® — can cause side effects like nausea and vomiting. And you might not have much of an appetite while on them.

“A protein-packed shake or bar can deliver the needed protein in a form that may be easier to consume,” says Dr. Bohl.

Meal-Replacement Protein Bar Nutrition Facts

The meal-replacement protein bars available through Hers are balanced, nutrient-dense bars designed for people taking weight loss medications like GLP-1s.

One Fudge Graham Bar contains:

• 160 calories

• 15 grams of protein

• 5 grams of fat

• 18 grams of carbohydrates

• 8 grams of sugar

• A medley of essential vitamins and minerals

If you’re looking for a quick meal replacement, these bars can help you stay on track with healthy eating habits without tons of unnecessary fillers or excess sugar.

A well-balanced diet packed with whole foods is the gold standard for getting essential vitamins, minerals, and nutrients to support overall health and weight management.

But let’s be real — life gets busy! Whether you’re constantly on the go at lunchtime or have a reduced appetite from weight loss medications like GLP-1s, meal-replacement bars can be a convenient way to ensure you’re still fueling your body properly.

To prioritize “real food” in other meals, here’s what to incorporate into your eating plan:

• Veggies and leafy greens, like spinach, kale, broccoli, and peppers

• Fruits, like berries, bananas, and citrus

• Whole grains, like quinoa, farro, brown rice, and whole-wheat bread

• Lean proteins, like chicken, turkey, fish, tofu, eggs, and Greek yogurt

• Legumes, like beans, lentils, chickpeas, and edamame

• Nuts and seeds, like almonds, walnuts, chia seeds, and flaxseeds

Try a few things each week to figure out what your favorite whole foods are. Then make a list of go-tos for your grocery runs.

→ Read next: What’s the Best Diet Plan for Women?

Other Weight Loss Tips

Though nutrition is important, you can support your healthy eating and weight loss efforts with other lifestyle habits. This includes:

• Exercising regularly. Research suggests that combining cardio and strength training is more effective for weight loss than doing one type of exercise alone.

• Drinking plenty of water. Drinking water can support weight loss by helping you feel fuller and keeping you from mistaking thirst for hunger. It also makes it easier to drink fewer sugary sodas and alcoholic drinks, which are high in calories but low in nutritional value.

• Getting enough sleep. Sleep is crucial for maintaining a healthy BMI (body mass index) and general wellness. Aim for 7 to 9 hours of sleep each night.

Lifestyle changes alone aren’t always enough for some people. Weight loss medications, like GLP-1s, might be worth exploring if you’ve struggled to lose weight with just diet and exercise — or if you have a medical condition that makes losing weight extra challenging.

Protein-rich meal-replacement bars can be a convenient and nutritious option. But sometimes, even healthy bars can interfere with your weight loss plans.

Here’s what to keep in mind to get the most out of them:

• Protein-rich meal-replacement bars can be great for people short on time or those not feeling up to a full meal while taking weight loss medications.

• To support weight loss efforts, choose bars high in protein and fiber, low in added sugars and artificial ingredients, and balanced with essential vitamins and minerals.

• Pay attention to the ingredient list and portion sizes to make this quick meal work for your weight loss goals, not against them.

• While whole foods should always be your primary source of nutrients, a well-chosen meal-replacement bar can be a smart protein source and supplement to your diet.

If you’re on weight loss medication, or considering it, Hers offers meal-replacement bars and protein shakes designed for folks on GLP-1 medications.

A healthcare provider on the Hers platform can tell you how to add them into your weight loss plan — whether as a meal replacement or a nutritious snack.

Get answers to frequently asked questions about meal-replacement bars below.

Are meal-replacement bars good for weight loss?

Meal-replacement bars can be good for weight loss. They can provide extra protein, which can help control hunger and cravings while preventing muscle loss. If you’re taking weight loss medication, they can be an easy way to consume protein when your appetite is low or when side effects crop up.

How often can I eat a meal-replacement bar?

You can eat meal-replacement bars every day, replacing one or two meals. Watch out for added calories and sugar, and make sure you’re choosing nutritious options, like bars high in protein, fiber, and vitamins. Eat whole foods at other meals.

Can I eat meal-replacement bars every day?

You can eat meal-replacement bars every day. Some are designed to replace one or two meals. If you’re doing this, go for options low in calories but high in nutrients, and eat whole foods at other meals.

Is a protein bar a meal replacement?

Some protein bars are designed to be meal replacements, and some aren’t. If you want to sub out meals, look for protein bars that contain protein and other nutrients like fiber, vitamins, and minerals.

This article is for informational purposes only and does not constitute medical advice. The information contained herein is not a substitute for and should never be relied upon for professional medical advice. Always talk to your doctor about the risks and benefits of any treatment. Learn more about our editorial standards.