Met-Rx Colossal Review

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Met-Rx Big 100 Colossal protein bars offer nutrition on-the-go to help fuel your body for the day, particularly for active people. You want to make sure that you’re exercising daily and eating a balanced diet with enough calories when using these protein bars. These bars have between twenty-eight and thirty grams of protein (depending on the flavor), including Metamyosyn, which is a mixture of fast and slow acting proteins. These will provide you with the nutrition needed to fuel your body.

Protein isn't the only beneficial ingredient in these bars. There are also minerals and vitamins packed into them to help support your wellness overall. These bars are deliciously naturally flavored to help you achieve your goals without dealing with the typical cardboard taste you find in protein bars.

Unlike many other protein products on the market, the Met-Rx Big 100 Colossal bars do not contain any artificial flavors or colors. There are six flavors to choose from and you can purchase them in boxes of four, eight, or nine individually wrapped bars.

Editor's Pros & Cons

28-31 grams of protein

Vitamins and minerals

Naturally flavored

Supports active lifestyles

Six flavors


Slightly pricey comparatively

High sugar content


Met-Rx was started in America by an anesthesiologist named Scott Connely. The brand has been sold multiple times. It is known best for its creation of a new spectrum of supplements for bodybuilding, called “meal replacement” powders (or MRPs).

Scott Connelly’s original product was meant to aid in preventing loss of muscle mass in critically ill patients. Met-Rx was marketed to the athletic and bodybuilding communities in partnership with Bill Phillips. Sales skyrocketed from a few hundred thousand dollars to more than one hundred million dollars annually. Met-Rx is currently in the hands of Nature’s Bounty.

For more than twenty years, Met-Rx has dedicated their time, energy, and resources to figuring out the best way to develop top-notch workout fuel. Protein and other nutrients your body needs will always be the main ingredients in Met-Rx’s workout enhancement products. The proteins work to help your body recover from exercise and give your muscles fuel with amino acids.

The company represents people who are striving to kick their training up a notch. The people that know what matters is what’s next. The next game or fitness goal. Hard work just doesn’t cut it. You must be getting the proper nutrition to optimize your results.


These bars contain between twenty-eight and thirty-one grams of protein each. Some of the protein is Metamyosyn, which is a mixture of fast and slow acting proteins. They can help keep you going all day by sustaining your energy level. Protein is digested slowly, so it will give your body energy continuously as it digests.

When you’re hungry between meals, just finishing a workout, or looking for an energy boost, protein bars can provide it for you. They also have the potential help you accomplish your weight loss goals (when paired with exercise and a balanced diet).

Because protein preserves your lean muscle mass, it is great at increasing your metabolism. It doesn’t take a whole lot of energy to digest carbohydrates, but it does take a bit more to digest protein, which will, in turn, boost your body’s ability to burn calories.

When you’re dieting, protein bars are a fantastic go-to for a snack between meals or even a meal replacement. They will help you to feel full for longer than snacks containing carbohydrates. Feeling fuller longer will help you to say no to your temptations. You don’t even need to have a reason to eat protein bars. You can simply eat them because they taste good or because they’re convenient, and you’ll be doing your body a favor in the process. Just make sure you’re exercising.

When To Use

The Met-Rx Big 100 Colossal bar is specifically formulated to be used post-workout. There are many benefits to eating a protein-rich bar after a workout to encourage quicker recovery. Due to higher intensity exercise, your body will need more time to recover. Protein can come in handy when it comes to speeding up recovery time.

In 2005, a study showed that leucine and whey protein worked more effectively than a solution of carbohydrate when it comes to protein synthesis. Protein synthesis is needed during recovery. It provides you with muscle maintenance, repair, and growth. This is important when you’re active, because your muscles may become inflamed and damaged.

Protein is transported to your muscle cells throughout your body in order to encourage recovery. During recovery, the fibers become bigger and stronger than they were before the damage was done. Therefore, you can look forward to building and sustaining muscle mass better when you use these protein bars after your workouts.


When it comes to flavor, it is one area that most protein bars are sorely lacking. Usually, when you eat a protein bar you expect a chalky taste with the texture of cardboard and so stiff they’re hard to bite into. They also typically leave your mouth so dry that you find yourself desperately searching for something to drink.

Met-Rx, however, delivers impressively on flavor. The Big 100 Colossal comes in seven different flavors. These flavors include chocolate chip cookie dough, peanut butter pretzel, chocolate toasted almond, caramel crunch, peanut butter, super cookie crunch, and crispy apple pie. With so many flavors to choose from, surely you’ll be able to find one that suits your taste buds.

Biting into a peanut butter pretzel bar is like dipping a pretzel right into the jar of peanut butter and eating it. The chocolate chip cookie dough flavor will satisfy your craving for cookie dough without all of the unhealthy ingredients. You can give in to your caramel craving with the delicious caramel crunch flavor without worrying about feeling gross afterward. Toasted almond and crispy apple pie will remind you of good weather and memories.

For Your Information

If you have any allergies or health concerns, please read this paragraph. It is important to know that these bars contain egg, milk, soy, almond, peanut, and wheat ingredients. Do not eat the bars if their wrappers have been tampered with in any way.

It is highly recommended that you develop an intense exercise program that you execute daily, along with a balanced diet with enough calories while using this product. For adults using this product, you will want to be sure to consume eight ounces of water or another liquid when you eat a bar.

Ingredients used in the Big 100 Colossal bars include 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. This product is produced with some genetic engineering.

Nutrition Facts

Each bar counts as a serving and contains four hundred and ten calories. One hundred and ten of those are from fat. There are twelve grams of fat, five grams of saturated fat, and zero grams of trans fat. Zero milligrams of cholesterol, five hundred and ten milligrams of sodium, two hundred and ten milligrams of potassium, and forty-seven grams of carbohydrates. There are three grams of dietary fiber, twenty-eight grams of sugar, and thirty grams of protein.

Also included in the bar is thirty-five percent of your daily value (DV), based on a two thousand calorie diet, of Vitamin A, thirty percent of calcium, forty percent of Vitamin E, forty-five percent of thiamin, niacin, and folic acid, thirty-five percent of biotin, thirty percent of phosphorus, twenty-five percent of magnesium, four percent of selenium, twenty-five percent of manganese, thirty percent of Vitamin C, fifty percent of iron, two percent of Vitamin K, and thirty-five percent of riboflavin.

There is thirty-five percent of your DV of riboflavin, thirty-five percent of Vitamin B-6, thirty percent of Vitamin B-12, thirty-five percent of pantothenic acid, thirty percent of iodine, forty percent of zinc, sixty percent of copper, and six percent of molybdenum.

Limitation Of Liability

According to all applicable laws, Met-Rx and any of their suppliers and third-party providers, will not be responsible for any damages (indirect, direct, punitive, incidental, exemplary, consequential, special, or otherwise) that are related to the services (this includes inability or delay in using services), any products, services, or information that is obtained through or advertised through the services, or the deletion or removal of any material posted or submitted on the services, no matter if based on tort, liability, contract, or otherwise, even if the suppliers or Met-Rx have been informed of the possible damages.

Any disputes that are submitted will be handled individually, instead of in a class, whether it be representative or consolidated action. Your only option for a solution for any disputes or claims that involve Met-Rx and are not covered by the terms of liability is to discontinue your services and request a refund of what you paid for the product or service. Refunds will be issued when claims are in accordance with the refund policy and terms of sale. The exclusions, limitations, and disclaimers that are outlined in these terms, and elsewhere, are enforced to the fullest extent allowed by law.


Contrary to popular belief, only one percent of the total population needs to avoid gluten in their diet. Most people who think that they’re gluten intolerant actually aren’t. But if you are part of the one percent that is intolerant, these bars will be safe for you to ingest. Met-Rx is proud of the fact that they use natural ingredients in their bars.

Even if you’re not somebody who is intolerant of gluten, you can still enjoy the benefits of adopting a diet that is low in or absent of gluten. A gluten-free diet can improve cholesterol levels. This is important because when you have a buildup of cholesterol in your body, you are more susceptible to serious health risks such as a stroke or a heart attack.

This kind of diet can also help your digestive health, increase your energy levels, and help eliminate processed foods and otherwise unhealthy foods from your regular diets, such as bread, oils, desserts, and fried foods.

When you are on this kind of diet, vegetables and fruit will become more common in your everyday routine because they are free of gluten. You can reduce your risk of developing diabetes, certain cancers, and heart disease. You will even be more equipped to fight off germs and viruses more easily because you’ll be eating more vitamins, antioxidants, and minerals.

Taking gluten out of your diet can help you to lose weight healthily, improve your health when it comes to arthritis and irritable bowel syndrome, and become more aware of the foods you’re putting into your body and how they will affect it.

Bottom Line

Whether you’re ending a long run, a rigorous workout, or a hard day at an active job, you can reach for a Met-Rx Big 100 Colossal bar. Packed with protein and other vital nutrients, these bars will give you exactly what you’re looking for.

These bars have the potential to immensely improve your overall health in many ways. Since they happy to be gluten-free, 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, help you to fight off germs and viruses, assist in losing weight in a healthy manner, help you to maintain your muscle mass, alleviate some symptoms related to arthritis and irritable bowel syndrome, and work to increase your metabolism.

These bars are slightly pricey compared to competitors, but they are affordable, high in protein, great for post-workout recovery, and come in seven delicious flavors (chocolate chip cookie dough, peanut butter pretzel, chocolate toasted almond, caramel crunch, peanut butter, super cookie crunch, and crispy apple pie). You can purchase them in boxes of four, eight, or nine.