MET Rx Big 100 Colossal Protein Bars

MET-Rx Big 100 Colossal Protein Bar Review

Each MET-Rx Big 100 Colossal protein bar has 30 grams of protein, 47 grams of carbs, 12 grams of fat, and 410 calories. However, while having 50% more protein than most bars, you’ll be dealing with a 400%+ spike in sugar (28 g per bar) when compared to MusclePharm Combat Crunch (5 g per bar).

So, can the Big 100 protein bars ever be able to take the place of whey protein powder as a healthy pre- or post-workout meal? In addition, how does the Metamyosyn in this recipe compare to other protein bar blends? (Isolate of whey protein, isolate of milk protein) In this review, we’ll compare MET-Rx Big 100 against MusclePharm Combat Crunch and Quest Bars from Quest Nutrition, two additional top-rated protein bars.

Protein, carbohydrate, and fat content, as well as cost per serving, tastes, customer comments, and total calories, are all compared. This is to ensure that you only purchase the most appropriate protein bar for your current diet and fitness goals. Weight loss, lean muscle growth, bulking, or just increasing your daily protein consumption are all options.

About Met-Rx

MET Rx Big 100 Colossal Protein Bars

For almost 20 years, MET-Rx has been the market leader in sports nutrition. Protein bars, RTDs, protein powders, multivitamins, amino acids, and creatine have established their name on supplying high-quality supplements. Natural Whey Protein Powder, Creatine 4200, and the MET-Rx Protein Plus bar are among the current bestsellers, each with over 500 positive Amazon ratings.

Meal replacement powders from MET-Rx are also well-known (MRPs). In the earlier edition, you had to combine powder from two canisters, one labeled “base” and the other “plus.” The micellar casein component was eventually eliminated and the product was offered as a single product. One of their most popular products is the MET-Rx meal replacement powder. 3 grams of L-glutamine, 38 grams of Metamyosyn protein, and more than 6 grams of BCAAs are included in each meal.

MET-Rx Big 100 Colossal Protein Bars Review


MET-Rx Big 100 Colossal Protein Bars
View prices for this protein bar!


The Company Behind Met-Rx Big 100

MET-Rx has been in business for more than two decades. It was created by Dr. Scott Connelly to assist ill patients in maintaining muscle mass while remaining in their hospital beds. For the first five years, the products appeared to function well, and Dr. Connelly became well-known. When the MET-Rx study claims were discovered to be false, his firm came under fire. Despite this, Dr. Connelly persisted, and his MET-Rx supplements became well-known.

When he sold the firm to the Rexall Sundown Incorporation in 2000, things started to shift. The proprietors of Rexall Sundown felt that MET-Rx may benefit more than simply hospital patients. The firm evolved into a fitness-focused business that caters to the bodybuilding and athletic sectors over time.

In the early 2000s, Met-Rx began supporting elite athletes including weightlifters and football players, which helped the firm acquire prominence. Nature’s Bounty Co. presently owns MET-Rx, which is still located in California. Weight reduction pills, protein drinks, powders, and meal replacement items are their specialties. Every year, MET-Rx sells over $100 million in goods.

While shipping its products domestically and globally, the marketing team targets a variety of age groups, from young to senior. South America, Africa, Asia, Australia, the Middle East, Mexico, Canada, and the Caribbean are among the most popular markets for MET-Rx medicines.

Met-Rx Big 100 Colossal Ingredients

MET Rx Big 100 Colossal Protein Bars Nutrition Facts

The specific macronutrient and calorie composition of Big 100 bars varies significantly depending on the taste, as it does with every protein bar. Cookie Crunch offers 32 g of protein per bar, whereas Chocolate Caramel Coconut has 30 g. The name Big 100 bars comes from the fact that each serving weights 100 grams. This generally contains 30 grams of protein, 46 grams of carbohydrates, 10 grams of fat, and 2 grams of fiber. However, sugars account for the majority of these carbohydrates (32 g).

There are a lot of low-carb protein bars out there, but none have as much protein as MET-Rx Protein Plus Bars. Each Protein Plus bar has 32 g of protein, 29 g of carbohydrates, and just 1 g of sugar (chocolate chocolate chunk taste). When compared to their Big 100 bars, this is a substantial drop. This reduction in carbohydrates lowers the calories per bar from about 400 to 310, making them a healthier choice for weight loss. MET-Rx has one of the most complicated protein blends we’ve encountered.

Most protein bars only have one or two kinds of protein (typically whey protein isolate and either milk protein isolate or soy protein isolate), whereas Big 100 bars have six, including casein. Calcium caseinate, milk protein concentrate, whey protein hydrolysate, whey protein isolate, casein, whey protein concentrate, dried egg whites, and L-glutamine are all included in the complete Metamyosyn VPP Protein Blend.


The protein content of these bars ranges from 28 to 31 grams per bar. Metamyosyn, a combination of rapid and slow acting proteins, makes up some of the protein. They can help you stay energized throughout the day by maintaining your energy level. Protein is slowly digested, therefore it will provide energy to your body continually while it digests.

When you’re hungry in between meals, recently finished a workout, or need a boost of energy, protein bars can help. They may also be able to assist you in reaching your weight-loss objectives (when paired with exercise and a balanced diet).

Protein is excellent for boosting your metabolism since it retains your lean muscle mass. It takes little energy to digest carbs, but it takes a little more energy to digest protein, which increases your body’s capacity to burn calories.

Protein bars are an excellent choice for a snack between meals or as a meal substitute when dieting. They will keep you fuller for longer than carbohydrates-based snacks. It will be easier for you to say no to your temptations if you feel fuller for longer. You don’t even need an excuse to consume protein bars. You can consume them just because they taste nice or because they are handy, and you will be doing your health a favor. Just make sure you’re getting some exercise.

Flavors Of Met-Rx Big 100 Colossal Protein Bar

Most protein bars are very deficient in taste when it comes to flavor. When you consume a protein bar, you usually anticipate it to have a chalky flavor, a cardboard feel, and be difficult to bite into. They also tend to dry up your mouth to the point that you’re frantically looking for anything to drink.

Met-Rx, on the other hand, is a taste powerhouse. There are seven distinct flavors available for the Big 100 Colossal. Chocolate chip cookie dough, peanut butter pretzel, chocolate toasted almond, caramel crunch, peanut butter, super cookie crunch, and crispy apple pie are some of the flavors available. With so many flavors to select from, you’re bound to discover one that appeals to your palate.

Biting into a peanut butter pretzel bar is like dipping a pretzel into a jar of peanut butter and eating it straight from the jar. The chocolate chip cookie dough taste will fulfill your cookie dough cravings without all of the bad stuff. With the delightful caramel crunch flavor, you can satisfy your caramel desire without feeling disgusting afterwards. The toasted almond and crunchy apple pie will bring back memories of pleasant weather.

Flavors of MET-Rx Big 100 include:

  • Crispy Apple Pie
  • Fruity Cereal Crunch
  • Chocolate Chip Cookie Dough
  • Jelly Doughnut Crunch Bar
  • Peanut Butter Pretzel
  • Super Cookie Crunch
  • Vanilla Caramel Churro

Nutrition Facts

Each bar has 410 calories and qualifies as a single serving. Fat accounts for a hundred and ten of those calories. There are 12 grams of fat, 5 grams of saturated fat, and 0 grams of trans fat in this serving. There are zero milligrams of cholesterol, 510 milligrams of sodium, 210 milligrams of potassium, and 47 grams of carbs in each serving. There are three grams of dietary fiber, 28 grams of sugar, and 30 grams of protein in this serving.

Vitamin A, thirty percent calcium, forty percent Vitamin E, forty-five percent thiamin, niacin, and folic acid, thirty-five percent biotin, thirty percent phosphorus, twenty-five percent magnesium, four percent selenium, twenty-five percent manganese, thirty pectin, thirty pectin, thirty pectin, thirty pectin, thirty pectin, thirty pectin, thirty pectin, thirty pect

There is 35% DV of riboflavin, 35% DV of Vitamin B-6, 35% DV of Vitamin B-12, 35% DV of pantothenic acid, 35% DV of iodine, 40% DV of zinc, 60% DV of copper, and 6% DV of molybdenum in this serving.

MET-Rx Big 100 Colossal Protein Bars Review


MET-Rx Big 100 Colossal Protein Bars
View prices for this protein bar!


Limitation Of Liability

Met-Rx and any of their suppliers and third-party providers will not be liable for any damages (indirect, direct, punitive, incidental, exemplary, consequential, special, or otherwise) resulting from the services (including the inability or delay in using the services), any products, services, or information obtained through or advertised through the services, according to all applicable laws.

Any submitted issues will be addressed individually rather than in a class, whether through representative or aggregated action. If you have a disagreement or a claim involving Met-Rx that is not covered by the terms of liability, your sole option is to stop using the service and request a refund of the amount you paid for the product or service. When claims are filed in line with the refund policy and conditions of sale, refunds will be given. The exclusions, restrictions, and disclaimers set out in these conditions, as well as elsewhere, are strictly enforced to the maximum extent permitted by law.


Contrary to common perception, only 1% of the population requires gluten avoidance in their diet. The majority of people who believe they are gluten intolerant aren’t. If you’re one of the one percent of people who can’t eat gluten, though, these bars are safe to eat. Met-Rx is proud of the fact that its bars are made with natural components.

Even if you aren’t gluten intolerant, you may get the benefits of a gluten-free or gluten-free diet. A gluten-free diet can help you lower your cholesterol. This is significant because a buildup of cholesterol in the body makes you more vulnerable to major health concerns like stroke or heart attack.

This type of diet may also improve your intestinal health, boost your energy levels, and help you cut out processed and otherwise harmful foods from your diet, such as bread, oils, sweets, and fried meals.

Because they are gluten-free, veggies and fruit will become more prevalent in your daily routine if you follow this diet. Diabetes, some malignancies, and heart disease are all preventable diseases. Because you’ll be eating more vitamins, antioxidants, and minerals, you’ll be better able to fight infections and viruses.

Taking gluten out of your diet can help you lose weight in a healthy way, improve your arthritis and irritable bowel syndrome symptoms, and become more conscious of the foods you eat and how they influence your body.

Benefits Of The Met-Rx Big 100

We’ve all heard about the Met-Rx Big 100’s advantages. It’s the finest protein supplement for bodybuilders on the market. It’s designed to offer you quick increases in protein breakdown. Protein is used by most athletes and bodybuilders as a supplement to help them get the most out of their exercises. It’s critical for the body to obtain the correct quantity of protein at the right times of day so that the muscles have enough energy to workout. 3

Athletes eat a lot of protein to help them grow muscle. Bodybuilders consume whey protein protein bars to assist them improve their exercise and endurance. Many of us are attempting to reduce weight or gain muscle, and protein bars can help us reach our objectives more easily since they are handy. Protein bars are easy to get in your local sports goods store or may be ordered online.

The Met-Rx Big 100 Colossal Protein Bars are a wonderful choice for bodybuilders who require a great product to help in their nutrition before and after working out. Athletes eat these protein bars at the right moment to restore their muscles and provide them the energy they need to finish their exercises. Many elite athletes eat the Met-Rx Big 100 bars at the right moment to provide their bodies the nutrients and protein they require to finish their workouts and improve their performance. 4

When Is The Best Time To Eat This Protein Bar?

The optimum time to take The Met-Rx Big 100 is just after you’ve finished working out. This will supply your body with enough protein and carbs to help it recover from its strenuous physical activity quickly. 5 Because the protein and carbs are stored in your muscles, you will eat the same number of calories as you would if you did not exercise. Carbohydrates also offer fuel for your body, allowing it to maintain a high metabolic rate. 6

High-grade creatine supplements are also included in the protein powder to assist your body in breaking down your muscles. Creatine is necessary for the formation of new cells and fibers, as well as the breakdown of fat. As a result, when you take The Met-Rx Big 100, you’ll absorb more creatine and break down more fat. If you’re looking to lose weight, this is the supplement for you. By taking the Met-Rx Big 100, you will begin to break down fat more quickly and melt the calories you consume, allowing you to lose weight without compromising your workout intensity or calorie intake.

Why Is The Met-Rx Big 100 Colossal Protein Bar The Best?

You would naturally want to discover why the Met-Rx Big 100 is the greatest as a professional bodybuilder. It’s true that when it comes to bodybuilding protein bars, things aren’t always as straightforward. There are several brands available, but how do you know which one will provide you with the greatest results? When looking for the proper supplement, there are a few factors to consider.

First and foremost, you must recognize that the market for bodybuilding protein bars is flooded. It’s essentially an arms competition, and it’s impossible to determine one brand is superior than the other. You should check at the supplement’s components. It’s always preferable to choose a brand with a greater whey protein concentration.

It’s crucial to remember that whey protein is both effective and consistent when it comes to muscle development. You will undoubtedly see excellent effects if you can discover a reputable brand that offers both of these advantages. 8 You’ll see why the Met-Rx Big 100 Colossal protein bar is the greatest when you compare the results you’ll receive from various bodybuilding protein bars.

MET-Rx Big 100 Colossal Protein Bars Review


MET-Rx Big 100 Colossal Protein Bars
View prices for this protein bar!


Side Effects Of Met-Rx Big 100 Colossal Protein Bar

So, what sort of side effects should we be aware of? The MET-Rx Big 100 bars come with a short list of ingredients. The bars’ potential adverse effects are not uncommon, and changing one’s eating habits will always cause some difficulty. Sugar alcohol is a component in these bars that might induce abnormal digestive patterns. Flatulence, stomachaches, nausea, and increased bowel motions are all symptoms of irregular digestion.

Does Met-Rx Big 100 Work?

The official website of MET-Rx includes comments about the amount of research that has gone into their different supplements and products. They claim to have 20 years of study to back up the quality and effectiveness of their workout goods.

Although the MET-Rx website includes testing results for the amino acid in Metamyosyn protein, there is no clear clinical or medical evidence to back up the company’s claims of muscle development, weight loss, or even reduced appetite. Many claims regarding MET-Rx Big 100 meal replacement bars are made on the official MET-Rx website, however those claims come with a caveat. Users should work out on a regular basis while using the device, according to the firm.

They also claim that the user would see benefits if they stick to a strict diet and avoid eating too many harmful items while eating the bars. Doctors and fitness experts, on the other hand, have determined that there is no convincing proof that the bars would create effects on their own.

In fact, they feel that looking into cheaper vitamins or weight reduction alternatives could be a smart idea. Met-claims Rx’s that the products can help with weight reduction or even muscle building are unsupported by research. The high sugar and fat content of the bar may not be a concern if you’re looking to build weight and muscle. The sugar and high fat content of the bar, on the other hand, are not exactly beneficial for the body if used as a meal replacement.

Doctors advise that everyone requires at least some carbs to recuperate after an exercise. But those carbohydrates don’t have to be sugars, especially not 29g of them.

Met-Rx Big 100 And Weight Gain

The solution will be determined by the customer’s objectives. These meal replacement bars may be an excellent choice to explore if someone is attempting to lose weight or reduce hunger. If a person consumes less calories and carbs than they would on a regular basis, they may be able to assist them achieve their weight reduction objectives.

It’s also worth noting that, according to the MET-Rx website, eating the bars alone won’t always result in weight reduction. To increase fat burning, customers must exercise on a regular basis. Instead of eating bad meals that will just make you gain weight, you could consume the bars to satisfy your appetite.

Another thing to bear in mind is that persons who engage in regular physical exercise are more likely to lose weight than those who do not. As a result, consumers must understand that while MET-Rx meal replacement bars are not always a major role in weight loss, regular physical exercise is.

This implies that additional weight-loss options should be kept in mind. Eating healthy foods and exercising regularly will help you lose weight, so a meal replacement bar may become obsolete at some point.

Directions For Met-Rx Big 100

If you’re trying to gain muscle, MET-Rx Big 100 bars should be consumed right after a workout. If you’re trying to lose weight, you can eat them instead of or in addition to a regular meal.

The bars should not be used to replace every meal throughout the day; instead, they should be eaten every three to four hours. In addition to eating these meal replacement bars on a regular basis, MET-Rx recommends that users exercise every day to balance exercise with a healthy diet.

This combination is designed to enhance the flow of nutrients into the body, resulting in long-term health benefits for the user. It’s also worth noting that MET-Rx Big 100 is mostly made up of soy protein isolate. Before purchasing the product, customers should see their doctor if they have any soy allergies.

Met-Rx Big 100 Alternatives?

Quest Bars

The Quest Bar is one of the most popular meal replacement snacks. The protein content of Quest Bars is 20 grams per bar, with only three grams of sugar. These bars are unique not only because of their high protein and low sugar content, but also because they include a variety of natural components. Quest bars are well-received for their quality and flavor, but they are on the pricey side, costing between two and three dollars each bar.

Bsn Syntha-6

The BSN Syntha-6 protein crisp, like the Quest Bars, is known for its flavor, high protein content, low calories, and low sugar. 20 grams of protein, 230 calories, and 2 grams of sugar make up Syntha-6 protein crisp.

Protein Cookie

Muscle Tech’s Protein Cookie is another highly rated and popular product. Each cookie is 350 calories and 18 grams of protein. The 14 grams of sugar and 9 grams of fat in Protein Cookie are the primary drawbacks. The Protein Cookie is a two-dollar treat.

Optimum Nutrition’S Cake Bites

These Cake Bites have gotten rave reviews for their flavor and reduced sugar content. Three Cake Bites provide 20 grams of protein and only five grams of sugar per serving. The cost of a package of 12 bites, each with three bits, is $19.99.

MET-Rx Big 100 Colossal Protein Bar Allergies

Please read this paragraph if you have any allergies or health concerns. It’s crucial to note that these bars include components such as egg, milk, soy, almond, peanut, and wheat. If the wrappers have been tampered with in any way, do not consume the bars.

While taking this product, it is strongly advised that you establish an aggressive workout routine that you follow on a regular basis, as well as a balanced diet with enough calories. When adults use this product, they should drink eight ounces of water or another beverage every time they eat a bar.

Metamyosyn, corn syrup, milk chocolate drops, brown rice syrup, glycerin, crystalline fructose, natural flavors, canola oil, maltodextrin, water, vitamins and minerals, potassium chloride, soy lecithin, almond butter, and peanut flour are among the ingredients in the Big 100 Colossal bars. This item is made with the help of genetic engineering.


You may grab for a Met-Rx Big 100 Colossal bar at the conclusion of a long run, a strenuous exercise, or a long day at an active job. These bars, which are high in protein and other essential nutrients, will provide you with just what you need.

In a variety of ways, these bars have the ability to greatly boost your overall health. They will be able to improve your cholesterol levels, promote better digestive health, increase your energy levels, reduce your risk for certain cancers, heart disease, and diabetes, assist you in losing weight in a healthy manner, help you maintain your muscle mass, and alleviate some arthritis and irritab symptoms because they are gluten-free.

These bars are somewhat more expensive than rivals, but they are still inexpensive, high in protein, excellent for post-workout recovery, and available in seven tasty flavors (chocolate chip cookie dough, peanut butter pretzel, chocolate toasted almond, caramel crunch, peanut butter, super cookie crunch, and crispy apple pie). They’re available in boxes of four, eight, or nine.

Frequently Asked Questions (FAQs)

Weight Loss Or Weight Gain?

Big 100 protein bars are made to help you gain weight or promote lean muscle growth and recovery as part of a healthy diet and exercise routine. Protein bars for weight reduction might be hard to come by. Finding a high protein, low calorie, low carb protein bar that helps you maintain a daily caloric deficit is your best bet. The Quest Protein Bars, for example, include only 6 grams of fat, 20 grams of protein, and as little as 170 calories.

Who Are They Designed For?

MET-Rx is known for its bodybuilding supplements and nutrition, but its Big 100 bars are suitable for runners, weightlifters, and anybody looking to improve their protein consumption.

When Is The Best Time To Take It?

The high carbohydrate content of MET-Rx Big 100 protein bars makes them ideal for pre-workout nutrition, providing you with the energy you need to execute high-intensity resistance or aerobic exercises. You may have one as a healthy snack at any time during the day. However, whether you’re trying to lose weight or gain muscle, carb consumption should be substantially decreased after 5-7 p.m.

MET-Rx Big 100 Colossal Protein Bars

$1.98 Per Bar










  • 32 Protein
  • Great Taste
  • Added Fiber
  • Smooth Texture
  • Dessert-Like Flavors


  • Quite Crumbly

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