How many calories are in a MET-Rx bar?

December 23, 2025 •

4 min read

With some MET-Rx varieties containing as many as 410 calories, the total calorie count varies significantly depending on the specific bar and flavor. The "Big 100" line, often used as a meal replacement, tends to have a higher calorie count than other, lighter protein-focused bars. Understanding these differences is key for incorporating a MET-Rx bar into your dietary plan effectively.

Quick Summary

The calorie count of a MET-Rx bar differs by product line and flavor. Variations range from 300 to over 400 calories, with higher counts for meal replacement bars. This depends on the specific ingredients, including protein, carbohydrates, and fat content.

Key Points

Variable Calorie Count: The calorie content of a MET-Rx bar differs significantly based on the specific product line and flavor.
Big 100 Series Calories: The larger, meal-replacement-oriented "Big 100" bars typically contain between 380 and 410 calories.
Protein Plus Series Calories: Lighter "Protein Plus" bars offer a more moderate calorie count, ranging from 300 to 320 calories.
Protein Content: Most MET-Rx bars provide a high amount of protein, often between 30 and 32 grams per bar, supporting muscle recovery.
Impact of Ingredients: Additions like chocolate coatings, caramel, and specific protein blends significantly contribute to the total calorie, fat, and sugar content.
Read the Label: The nutrition label on each individual bar is the most accurate source of information for its specific calorie count and macronutrient breakdown.

Calorie Breakdown by MET-Rx Bar Flavor

Knowing the exact nutritional information for your favorite MET-Rx bar is crucial for tracking your daily intake. The calorie count can vary by over 100 calories between flavors, primarily due to differing ingredients and portion sizes. For instance, flavors with extra caramel, chocolate chips, or peanut butter tend to be more calorie-dense.

The "Big 100" Colossal Series

The Big 100 series from MET-Rx is known for being a hefty meal replacement option. As such, these bars typically pack the highest calorie punch. Key nutritional details for some popular Big 100 flavors include:

Super Cookie Crunch: This flavor contains approximately 410 calories per 100-gram bar. It is one of the most calorie-dense options available, with a balanced mix of protein, fat, and carbohydrates.
Peanut Butter Pretzel: Another high-calorie option in the series, the Peanut Butter Pretzel bar also clocks in at around 410 calories. Its rich flavor profile is reflected in its energy content, making it a substantial meal replacement.
Chocolate Chip Cookie Dough: At 380 calories per 100-gram bar, this option is slightly lower in calories but still very satisfying. This bar is also known for its high protein content, making it a favorite for muscle recovery.
Salted Caramel Brownie: This flavor sits at approximately 390 calories per bar, offering a good balance for those who need a substantial meal replacement.

Protein Plus Series

The Protein Plus series offers bars with a slightly lower calorie count compared to the Big 100 line, focusing more on a balanced, high-protein snack. Notable options include:

Peanut Butter Cup: This bar contains about 300 calories per 85-gram serving. It is gluten-free and provides a significant protein boost without the higher calories of the meal replacement bars.
Creamy Cookie Crisp: This flavor has a slightly higher calorie count at around 320 calories per 90-gram bar. It provides a good source of protein for a post-workout snack.

Calorie Comparison Table

To provide a clearer picture, here is a comparison of the calorie content of popular MET-Rx bar flavors. This table includes the bar type, flavor, approximate serving size, and total calories.


Bar Type	Flavor	Serving Size (approx.)	Calories (approx.)	Protein (approx.)
Big 100 Meal Replacement	Super Cookie Crunch	100g	410	32g
Big 100 Meal Replacement	Peanut Butter Pretzel	100g	410	30g
Big 100 Meal Replacement	Chocolate Chip Cookie Dough	100g	380	30g
Big 100 Meal Replacement	Crispy Apple Pie	100g	390	30g
Protein Plus	Peanut Butter Cup	85g	300	30g
Protein Plus	Creamy Cookie Crisp	90g	320	32g

Factors Influencing Calorie Count

Beyond the base formulation, several factors influence the final calorie count of a MET-Rx bar:

Metamyosyn Protein Blend: MET-Rx bars often feature a proprietary Metamyosyn blend, which combines fast and slow-digesting proteins. This protein-heavy formula contributes significantly to the overall calorie and macro profile.
Added Sugars and Fats: The flavorings, coatings, and binders in each bar dictate a large portion of the calories. Bars with extra chocolate coatings or caramel layers will inevitably contain more fat and sugar, and thus, more calories.
Portion Size: As highlighted in the table, the size of the bar matters. The larger, meal-replacement-focused Big 100 bars (100g) naturally have more calories than the smaller Protein Plus bars (85-90g).
Ingredient Variations: Minor recipe changes or specific ingredient sourcing can lead to subtle variations in the nutritional values listed on the packaging. It is always best to check the label for the most accurate information.

How to Fit a MET-Rx Bar into Your Diet

Given their varying calorie counts, MET-Rx bars can serve different purposes within a diet plan. For those seeking a substantial meal replacement to fuel a demanding workout, a Big 100 bar with 400+ calories may be appropriate. However, if you need a lighter post-workout snack or a quick energy boost, a 300-calorie Protein Plus bar might be a better fit. When consuming these bars, remember to consider your overall daily caloric needs and fitness goals.

The Role of Protein and Macronutrients

While calories are important, it's the macronutrient composition—specifically protein, carbs, and fat—that defines the bar's role in a fitness regimen. For example, the high protein content in MET-Rx bars (30-32g) is designed to aid in muscle recovery. The carbohydrate content provides energy, while fats add to satiety and overall calories. For a balanced diet, it's essential to not rely solely on protein bars but to include whole foods rich in nutrients as well.

Conclusion

In summary, the number of calories in a MET-Rx bar is not a single, fixed number. It varies based on the product line and flavor, with the larger "Big 100" meal replacement bars typically containing between 380 and 410 calories, and the lighter "Protein Plus" bars ranging from 300 to 320 calories. Checking the nutrition label for your specific flavor is the most reliable way to determine its caloric content. This understanding allows you to make an informed decision and effectively incorporate these protein bars into your dietary and fitness plans, whether as a meal replacement or a supplement.

Frequently Asked Questions

No, not all MET-Rx bars are considered high-calorie. The larger "Big 100" line, designed as a meal replacement, has higher calories (around 380-410), while the "Protein Plus" series offers lower-calorie options (around 300-320) that are more suitable for a snack.

A MET-Rx Super Cookie Crunch bar, which is part of the "Big 100" meal replacement series, contains approximately 410 calories per bar.

The protein content in MET-Rx bars is generally high, with many varieties, particularly in the "Big 100" series, offering between 30 and 32 grams of protein per bar.

MET-Rx bars can be part of a weight loss plan due to their high protein content, which can increase satiety and help manage hunger. However, their calorie count should be factored into your daily caloric intake, as some varieties are higher in calories and may be better suited for meal replacement.

Compared to many other protein bars, MET-Rx bars, especially the "Big 100" line, tend to be higher in both calories and protein content. This positions them more as a meal replacement than a light snack.

Yes, MET-Rx offers different product lines, such as the "Big 100" and "Protein Plus" series, which have distinct formulations in terms of calorie count, protein content, and overall macronutrient composition to serve different dietary needs.

The primary sources of calories in a MET-Rx bar come from a blend of protein, carbohydrates (including added sugars and corn syrup), and fats. The exact ratio varies by flavor and product line.