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To maximize your protein intake, you’ll need a product like the MET-Rx Big 100 Colossal Protein Bars, which is extremely high in protein. Designed as a meal replacement bar, they contain 30+ grams of protein, are between 300 and 410 calories, and have a variety of vitamins and minerals. There are also five flavors to choose from. Just keep in mind that certain flavors contain a lot of sugar—for instance, the Peanut Butter Pretzel flavor contains 28 grams of sugar per bar.
Reviewers say these protein bars are extremely filling, and many like the texture and flavor, too: “These are very large and filling, which I am guessing is the point,” says one reviewer. “It has a ton of protein, and I typically break it up into smaller portions to eat throughout the day.”
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You’ll be hard-pressed to find a lower calorie option than the Protein One Protein Bars, which contain just 90 calories each. They come in flavors like Chocolate Chip, Strawberries and Cream, and Salted Caramel Crisp. Despite being low in calories, each bar packs 10 grams of protein with only 1 gram of sugar. (They do contain 4 grams of sugar alcohol, though.)
According to reviewers, these protein bars aren’t the best-tasting option out there, but they’re convenient and affordable. “They have a nice satisfying chewy texture and a little bit of chocolate for your sweet tooth,” writes one reviewer. “The 90 calorie count is a bonus for when you want a small snack without racking up too many calories.”
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If you follow a keto diet, which involves eating high levels of fat and protein and limited carbs, the think! Keto Protein Bars are a great snack to keep in your kitchen cupboard. Each bar has 10 grams of protein and just 4 net carbs, and there are a few flavors to choose from, including Chocolate Peanut Butter Pie and Chocolate Mousse Pie.
Many reviewers say the Chocolate Peanut Butter flavor tastes similar to a Reese’s, but they do warn that the chocolate coating of these bars is prone to melting in hot weather—so they’re probably not the best option to carry around in your bag.
Be sure to try our recipe for keto-friendly protein pancakes, too!
Evaluation Criteria
To compile this list, we relied on a combination of personal experience and user reviews. We’ve tried several of the protein bars included, but for those we haven’t tested, we looked for highly rated products and read through dozens of user reviews, evaluating what reviewers said about the product’s taste, texture and price.
We selected products that contain 10 grams of protein or more, and the majority of our picks are less than 300 calories and contain less than 10 grams of sugar. (There are a few exceptions, which we qualify below.)