MET-Rx Big 100 Colossal Protein Bars

Last updated date: June 18, 2021

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MET-Rx Big 100 Colossal Protein Bars

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We looked at the top Meal Replacement Bars and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Meal Replacement Bar you should buy.

Update as September 14, 2021:
Checkout The Best Meal Replacement Bar for a detailed review of all the top meal replacement bars.

Overall Take

Workout enthusiasts and individuals who play sports will love these meal replacement bars. They are higher in protein than many other meal replacement bars with 30 grams of protein per serving. It is important to note, however, that they are also higher in calories and carbs, which may not work for certain diets. We loved the crunch that the pretzels gave this bar.

In our analysis of 78 expert reviews, the MET-Rx Big 100 Colossal Protein Bars placed 5th when we looked at the top 19 products in the category. For the full ranking, see below.

From The Manufacturer

MET-Rx Big 100 Colossal is a meal replacement bar that provides the on-the-go nutrition you need to help fuel your active lifestyle.* This nutritious bar has 30 grams of protein and features METAMYOSYN, to give you the nutrition you require both in and out of the gym.* In addition, each bar has vitamins for energy metabolism and antioxidant support. MET-Rx Big 100 Colossal is a delicious, naturally flavored meal replacement bar that aids you in your journey to achieve your fitness goals.*

Expert Reviews

Expert Summarized Score

8 expert reviews

User Summarized Score

242 user reviews

What experts liked

Extremely high amount of protein at 30 grams per bar,which should satisfy your hunger. Mixes fast and slow acting proteins, which is deal for athletes.
- BestReviews
The majority of users have rated the meal replacement bar positively for its remarkably good taste. Many protein bar companies fail in this category, which is why MET-Rx stands out in this aspect.
- dietspotlight
If your goal is to bulk up and add muscle, the high calories and carbs, combined with 30g of protein per serving will certainly make it easier. No other protein bar we've seen has more calories.
- USA Home Gym
No observed side effects.
- Supplement Reviews
Formulated with high nutrition to keep up with high level athletes.
- Pure Path
General creaminess that is not found in most meal replacement bars.
- Bony Muscle
If there’s one thing we want to touch upon in this Met-Rx Big 100 Colossal bars review, it’s that these bars taste fantastic. One huge complaint that people have about protein bars is that they often have a texture that can only be described as “chalky”. The Big 100 bars not only avoid this problem, but impress us with a chewy texture.
- The Supp
When I began eating it, I had no problem eating the entire bar very quickly. I have a very small appetite and for me, even eating a large protein bar is a lot of calories for me to consume.
- Body Building Pro

What experts didn't like

A little pricey per bar versus some others. Has 410 calories per bar, which is high.
- BestReviews
One thing customers have complained about is the high cost of the product and the varying results for those trying to lose weight.
- dietspotlight
In terms of price, they're slightly more expensive than most protein bars.
- USA Home Gym
The sugar slightly high.
- Supplement Reviews
Melts more easily
- Pure Path
Always creates the feeling of a full stomach, which does not suit some athletes after a workout
- Bony Muscle
Met-Rx Big 100 Colossal bars have one side effect that you should keep in mind. Every bar contains sugar alcohols, which may cause gastrointestinal discomfort for some people.
- The Supp

An Overview On Meal Replacement Bars

Preparing a healthy breakfast, lunch and dinner for yourself or your entire family may not always be possible. You might wake up a little later than expected with no time to cook bacon and eggs, or you might need to run your 10-year-old from band practice to soccer camp without any time to stop for dinner. When life gets busy and you can’t cook, there’s always the option of utilizing a meal replacements bar instead.

Kristin Forte/Simplemost Media

Meal replacement bars are designed to be more than just a quick snack. They contain the nutrients you would have received if you had consumed a traditional plate of food. Some bars are marketed to help people lose weight, while others even promote an increase in energy after consumption.

While the United States does not have any specific regulations for meal replacement bars, there are a few things you’ll want to look for when shopping for one. The first is calories. Check to see that the bar has between 200 and 400 calories, as this is where you’re going to get your energy. The PROBAR Meal Bar, for example, has 370, which will give you the boost you need to continue on with your day.

Kristin Forte/Simplemost Media

Next, review the meal replacement bar’s protein content. The higher the protein, the fuller you’ll feel for a longer period of time. Some bars have protein content that’s as much as 30 grams per bar.

The nutrition label will also specify how many vitamins and minerals are in the meal replacement bar. If you know you are deficient in a certain vitamin, or that you’re not getting enough of a certain mineral in the foods you eat, you can scroll through the label to check for that information. You’ll notice there are bars that are loaded with 19 vitamins and minerals, including Vitamin C, Vitamin E and Selenium.

Kristin Forte/Simplemost Media

Fiber is another key ingredient often found in meal replacement bars. Like protein, the fiber will help you feel full until your next meal. It also has the added benefit of keeping your digestive system running smoothly, so that you don’t suffer from uncomfortable constipation. Some ingredients to look for that are excellent sources of fiber include chia and flax seeds.

Kristin Forte/Simplemost Media

Finally, when shopping for the best meal replacement bar, it is essential that you check the sugar content. This is true whether you suffer from diabetes or not. Too much sugar will provide a temporary burst of energy. But afterward, you’ll suffer a sugar crash that will inevitably leave you feeling tired and moody.

The Meal Replacement Bar Buying Guide

  • Always read the product label if you have any known food allergies or sensitivities. Most meal replacement bars clearly label whether they are gluten-free, soy-free or contain common allergy ingredients, such as peanuts. You may also find wording like “manufactured in a plant that processes peanuts.” So even if the bar doesn’t contain peanuts, you’ll know that it may have come in contact with the legume.
  • Additional information you may wish to be aware of when choosing a meal replacement bar is whether the ingredients are organically sourced and whether they are Non-GMO Project Verified. If this is important to you, the product label is where you will find the facts.
  • Check that there are no artificial colors, flavors or sweeteners added to the bars. You want to get your nutrition from natural sources when possible. The MRE Bar is a good example of a meal replacement bar that is made from real food only.
  • Perform a taste test. There are so many different meal replacement bars on the market and each company offers a selection of flavors. You may come across such flavors as chocolate pretzel, caramel cluster, peanut butter cup, banana nut bread, almond crunch and blueberry cobbler. Try purchasing a few different bars to discover your likes and dislikes before you decide on your go-to bar.
  • Consider the texture of the bar. Some bars are chewy, while others have a crunch. The bars may also be smooth or have chunks of peanuts or pretzels sticking out.
  • Verify which type of meal replacement bar you are buying. Is the bar simply for taking the place of lunch or dinner when you’re on the run, or is the bar made for weight loss? Is the bar touted as a sports nutrition bar that replaces energy after a vigorous workout? You want to make sure the bar you buy will meet your specific needs.
  • Keep a few bars in your purse, gym bag or car so that you always have one available when life gets busy. This will save you from being tempted to head to the nearest fast food joint, that may or may not have healthy food options.
  • Meal replacement bars can be a lifesaver if you are the designated snack mom for your child’s sports team. Pair each bar with a water bottle or natural juice box and you’ll feel good about restoring the kids’ energy after a well-played game.
  • While you can purchase a single meal replacement bar, it is more cost-effective to buy in bulk. When comparing prices, you’ll need to pay attention to how many bars are being sold as a unit.