At a Glance
- Protein bars are snacks, not meal replacements.
- Whole-food ingredients give protein, fiber, healthy fats.
- RxBar, David’s, Perfect Bar top the list.
Why it matters: Picking the right bar keeps you satisfied without excess sugar or processed ingredients.
Protein bars can be a convenient way to boost protein intake, but they’re best used as a supplement to whole foods. A smart choice balances protein, fiber, and healthy fats while limiting added sugars and artificial ingredients. This guide highlights the top bars and shows what to look for on the label.

What to Look For in a Protein Bar
Reading the nutrition facts helps you compare bars quickly. Pay attention to serving size, calories, protein, fiber, and added sugars. Avoid bars with hydrogenated oils, artificial sweeteners, or long ingredient lists.
Jamie Mok, registered dietitian and spokesperson for the Academy of Nutrition and Dietetics, warned:
> “They could also sneakily pack a lot of added sugar, and turn into a candy bar,” says Mok.
Top Protein Bar Picks
RxBar is the best overall choice. It uses egg whites, dates, and nuts for a complete protein and natural sweetness. David’s Protein Bar delivers the highest protein content, while Perfect Bar offers a gluten-free option with a peanut-butter flavor.
| Bar | Calories | Protein | Fiber | Added Sugars |
|---|---|---|---|---|
| RxBar | 200 | 12 g | 5 g | 0 g |
| David’s Protein Bar | 150 | 28 g | 1 g | 0 g |
| Perfect Bar | 340 | 17 g | 3 g | 19 g |
All three bars stay under 350 calories, but Perfect Bar contains 19 g of added sugars, which may not fit every diet.
When Is the Best Time to Eat a Protein Bar?
A protein bar works best as a snack between meals or as a quick post-workout fix. Whole foods are still the preferred source of nutrition, but bars can bridge gaps when you’re on the go.
Key Takeaways
- Protein bars are snacks, not meal replacements.
- Look for 10-20 g of protein, 5 g of fiber, and less than 5 g of added sugars.
- RxBar, David’s, and Perfect Bar are the top picks, each with distinct strengths.
Protein bars can keep you energized, but choose wisely to avoid excess sugar and processed ingredients.

