The best protein bars are grab-and-go snacks, not meal replacements. They’re most helpful when whole foods aren’t available or when your schedule won’t allow for a proper meal. The most beneficial sources of protein come with fiber, healthy fats, and other nutrients. (That’s why registered dietitians recommend whole foods over ultra-processed alternatives.) So, while high-protein snacks may boast impressive counts on the label, they’re not always the healthiest option.
After consulting the nutrition experts about key ingredients to look for (and what to avoid), we’ve rounded up the best protein bars that meet those standards. For more tips on protein, check out our guide to the Best Protein Powders and How Much Protein Do I Need?
Updated March 2026: I added Aloha Organic Protein Bars, Promix Protein Puff Bars, and Mush Protein Bars as new picks. I added an Honorable Mentions section with more protein bars to consider, as well as a FAQ section that includes a note about David Protein Bars. Lastly, I’ve included my testing process and updated existing picks with new information, prices, and links.
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Best Protein Bars Overall
RxBar now offers a couple of different protein bars, but the Classic 12G remains the best. Made from whole foods, the base is a mix of egg whites—a complete protein—dates for sweetness and binding, and nuts (pecans, hazelnuts, cashews, walnuts, peanuts, almonds). I’ve taste-tested the chocolate sea salt, but RxBar also sells blueberry, peanut butter, peanut butter chocolate, vanilla almond, coconut chocolate, and strawberry. It has a sticky, uber-chewy texture, so if that’s not your taste, there’s a nut butter & oat variety pack that swaps the dates for rolled oats. These may also be a better option if you follow a keto diet or are concerned about the sugar from dates, but keep in mind that nut butters still contain sugar, and protein content varies by flavor, so check the nutrition label.
Avoid these if you’re allergic to eggs. The formula is otherwise simple and clean, with the exception of “natural flavors.” RxBar has shared more information on what those entail, which is more clarity than most companies offer, but it may still be a concern if you prioritize full transparency.
TL;DR: RxBars is one of the cleanest protein bars available, with a short ingredient list and balanced macros. There are several variations to choose from, but avoid them entirely if you have an egg allergy. 7.25/10.
Best Plant-Based Protein Bars
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Photograph: Boutayna Chokrane
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Photograph: Boutayna Chokrane
Aloha
Organic Protein Bars
Aloha Protein Bars are a standout vegan option, offering 14 grams of protein from brown rice and pumpkin seed blends. They also deliver between 6 and 10 grams of fiber, depending on the flavor, so some bars (like the cookies and creme) are as much a fiber boost as a protein snack. They’re free from soy, dairy, gluten, stevia, and sugar alcohols. Their sweetness comes from monk fruit, tapioca syrup, and rice syrup powder. While mostly clean, they do contain natural flavors, which seem to be the only processed outlier.