Protein bars are ideal for people wanting to lose weight, make better food choices, or have a filling snack while traveling. Yet, too many bars are high in added sugar, saturated fats, gums, and other ingredients that aren’t healthy. In this post, I’ll share my favorite low sugar protein bars that will fill you up and have better ingredients than other brands.

What Counts as Low Sugar?

To start off, the Dietary Guidelines for Americans recommends eating less than 10% of our total calories from added sugar. A low sugar food is to have 5% of your daily value (DV) or less of added sugar.

Well what does that exactly mean?

Let’s say you eat around a standard 2,000 calorie diet. 10% of your total calories would be 200 calories. This would be about 50 grams or less of added sugar in a day. Which honestly sounds like a lot!

If we are looking to eat a low sugar protein bar then, 5% of the suggested 50 gram total daily limit is 2.5g of added sugar. To keep the added sugar that low, most bars are going to have sugar alcohols or non-nutritive sweeteners in them. Common sweeteners you will see on nutrition labels are erithrytol, sucralose (splenda), stevia, or monk fruit. 

Many of these non nutritive sweeteners do not raise blood sugar, making them a perfect choice for those who want to manage their blood sugars or who have Type 2 Diabetes. Even if managing blood sugar is not a top priority for you, eating foods that do not spike your blood sugar can be very helpful for keeping cravings controlled and energy levels steady.

And who of us doesn’t want more sustained energy? For all those in the back who are reaching for coffee or an energy drink at 2pm- yes, this is for you!

Best Low Sugar Protein Bars

There are so many brands that have less than 2g of sugar, but not all ingredients are equal. This post isn’t a deep dive on non-nutritive sweeteners or what additives are good or bad.

However, if you are looking for low sugar protein bars because you want to try to replicate the Optavia 5 and 1 diet without having to buy the overpriced “fuelings”, please read Optavia Ruined My Life: [A Dietitian’s Insider Review of the Diet]

Best Vegan Bar

ALOHA Chocolate Coconut Almond

Best Birthday Cake

ONE bar. I am obessesed with all birthday cake flavored treats, granolas, and snacks which is why I made a category for it. These are similar to Quest bars, but have a much better texture and not as much fiber.

Best Overall Flavor

Think! High Protein Girl Scouts Thin Mint. Rumor has it you can freeze these to make them taste more dessert like? I haven’t tried it myself. Yet, anything Thin mint flavor, you can’t go wrong!

Most Unique

Magic Spoon Protein Treat Bar. I thought this was a really great idea. Most protein bars have similar textures and there aren’t many crispy bits in there. I love how this resembles a Rice Krispy bar.

Best for Weight Loss

If you want to find bars that are best for weight loss specifically, head over to Protein Bars for Weight Loss: Top Picks from a Dietitian (2026) 

Some of the bars suggested are lower in added sugar, but have more than 2.5g, so they don’t qualify as “low sugar”.  Many of them may have 5-7g. I do find that bars that use some added sugar, instead of only non calorie sweeteners do not have an aftertaste and sometimes taste better. Just a personal preference. However, all the bars listed are high in protein, so they make a perfect breakfast for weight loss. 

If you thought about Quest, or have tried it before, be sure to read Are Quest Bars Healthy? What a Dietitian Wants You to Know Before You Buy.

Best Ingredients:

RX Bar

There are so many flavors to chose from. I love how they also have seaonal flavors in the fall and winter like peppermint, gingerbread, and pumpkin pie! There is no added sugar or sugar alcohols. They use whole food ingredients like egg whites, dates, and nuts instead of protein isolates, artificial sweeteners, gums, or oils.

These bars are also sold at Costco, making them more cost effective than buying a single bar from a grocery chain. At my local kroger, these cost $2.49 for 1 bar. At Costco, they are about $1.28/bar, and that is when they are full price. Often they go on promotion and are a better deal!

With 12 grams of protein in the original RXbar- not only is it filling, its 100% dietitian approved!

Other Low Sugar Snacks

While protein bars are a convenient snack, if you want to mix it up and include other no-sugar added snacks or ones that don’t have too much added sugar I have extra resources for you! These posts have both homemade snacks and premade options to fit your lifestyle.

1. Low Sodium Snacks- 16 Easy Heart Healthy Ideas from a Dietitian
2. Healthy Snacks for Nurses: 20 Quick Options from a Dietitian
3. DASH Diet Snacks: 10 Delicious and Healthy Options to Satisfy Your Cravings

Other Protein Options

If you are the protein shake type, or like to switch between eating protein bars and drinking shakes, I would highly recommend the brands featured in these posts:

1. Low Sodium Protein Powder [Best Tasting + Highly Rated 2026]
2. Best Low Sodium Protein Shakes: A Dietitian Shares All

Conclusion

There are so many low sugar protein bars on the store shelves, you will not ever get bored of any of them! Each brand of bar has a unique taste and texture, so you might have to try a few brands before you find one you really love.

Laurie Thenedy, RD

Laurie is a Registered Dietitian passionate about helping healthcare professionals lower their weight, blood pressure, and cholesterol so that they can regain confidence and energy to live a more full life.