Best low-carb protein bars
Ranked by net carbs, protein and how much they taste like candy.
The protein bar aisle is a minefield of sugar bombs disguised as health food. These are the bars that actually deliver high protein and low net carbs — without a sugar crash.
At a glance
| # | Product | Net carbs | Protein | Cal | Price | |
|---|---|---|---|---|---|---|
| 1 | David Protein Bar | 0g | 28g | 150 | ~$3/bar | Buy → |
| 2 | Quest Protein Bars | 4g | 21g | 200 | ~$2/bar | Buy → |
| 3 | Grenade Carb Killa Bar | 6g | 20g | 215 | ~$2.50/bar | Buy → |
| 4 | Barebells Protein Bar | 8g | 20g | 200 | ~$3/bar | Buy → |
| 5 | Built Built Bar | 5g | 17g | 130 | ~$2/bar | Buy → |
| 6 | IQBAR Protein Bar | 1g | 12g | 150 | ~$2/bar | Buy → |
| 7 | No Cow Protein Bar | 5g | 20g | 190 | ~$2.50/bar | Buy → |
| 8 | ONE ONE Bar | 8g | 20g | 220 | ~$2/bar | Buy → |
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The picks, ranked
Protein Bar
28g protein, 0g sugar, 150 cal — the 2026 protein-bar phenomenon.
Protein Bars
21g protein, 4g net carbs, fiber-rich — the keto pantry classic.
Carb Killa Bar
Dense, layered, 20g protein and ~2g sugar.
Protein Bar
Candy-bar texture, 20g protein, no added sugar.
Built Bar
Marshmallowy, chocolate-covered, 17g protein and low sugar.
Protein Bar
Plant-based, 12g protein, 1g net carb, with brain nutrients.
Protein Bar
Dairy-free, 20g plant protein, 1g sugar, high fiber.
Frequently asked
What is the lowest-carb protein bar?+
The David bar leads at 0g sugar and effectively 0g net carbs with 28g protein. IQBAR is the best plant-based option at ~1g net carb.
Do protein bars kick you out of ketosis?+
Some do — watch for maltitol and high total sugars. The bars here use fiber and keto-friendly sweeteners to keep net carbs at 0–8g.
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