Ghost vs Grenade Carb Killa (2026): Which Protein Bar Wins on Protein-Per-Calorie, Fiber, and Sweeteners?

Ghost vs Grenade: The Quick Verdict

• Most protein per calorie: Grenade, by a wide margin — its best flavor (Caramel Chaos) hits 11.3g of protein per 100 calories vs. Ghost's 7.4g (8.0g for its Cookie Dough flavor).
• Cleanest protein source: Ghost — its blend is 100% dairy with no collagen. Grenade's blend includes bovine collagen hydrolysate, an incomplete protein missing tryptophan that dilutes its 20–23g claim by an undisclosed amount.
• Lower calories per serving: Grenade — 203 to 240 calories per 60g bar vs. Ghost's 250 to 270 calories per 65g (2-bar) pack.
• Fiber: Close to a tie at the top end — Grenade's best-fiber flavors (Dark Chocolate Mint, Caramel Chaos) hit 6.7–7.0g; Ghost's Chocolate Caramel and Chocolate Peanut Butter also land at 7g. Ghost's Choco Chip Cookie Dough is reported at roughly 9g but that figure carries less certainty than the rest of the data here (see note below).
• Avoids sucralose: Ghost — it sweetens with maltitol, allulose, sorbitol, and stevia, with no sucralose or Ace-K. Grenade uses maltitol plus sucralose (no Ace-K, unlike Barebells).
• Sugar: Both are low — Ghost at 2g per pack, Grenade at 0.6–2.0g per bar depending on flavor.

Side-by-Side Nutrition: Flagship Servings

Ghost is sold as a 2-stick, 65g pack labeled as one serving; Grenade is a single 60g bar. The closest like-for-like comparison is Grenade's highest-protein flavor (Caramel Chaos) against Ghost's standard flavor (Chocolate Caramel), since both are chocolate-caramel profiles.

Grenade's Caramel Chaos wins on protein efficiency and calories, but it's a smaller, denser bar (60g vs. Ghost's 65g 2-stick pack) with a collagen-diluted protein claim. Ghost costs 67 more calories for 3g less protein, but every gram of that protein comes from a complete dairy source.

Full Flavor Lineups Compared

Grenade publishes verified macros across nine core US flavors; Ghost's US lineup currently spans three. Both brands hold protein roughly constant across flavors while calories, fat, and carbs shift with the flavor profile.

*Ghost's Choco Chip Cookie Dough carb and fiber split is plausible from multiple retailer databases but, per our original Ghost nutrition guide, is not confirmed to the same certainty as its other two flavors — treat the ~9g fiber figure as an estimate rather than a confirmed label value.

Protein Quality: Collagen vs. Collagen-Free

This is the biggest structural difference between the two bars. Ghost's protein comes from three complete dairy sources — hydrolyzed milk protein isolate, whey protein concentrate, and milk protein isolate — none of which is collagen. Grenade's blend adds bovine collagen hydrolysate to a similar dairy base of calcium caseinate, whey protein isolate, and milk protein isolate.

Collagen is missing tryptophan, one of the nine essential amino acids, which makes it an incomplete protein. Neither brand discloses what share of its headline protein figure comes from collagen versus complete dairy sources, so the effective complete-protein content of Grenade's 20–23g claim is lower than the label number by an unknown amount. If protein completeness for muscle protein synthesis is your priority, Ghost's all-dairy blend is the stronger pick despite the lower raw gram count.

Sweeteners: Where the Two Brands Diverge

Both bars lean on maltitol as a primary sweetener — a sugar alcohol with a glycemic index in the 35–53 range, meaningfully higher than erythritol's near-zero GI. Where they diverge is everything else in the stack:

• Grenade pairs maltitol with sucralose only. No Ace-K, no erythritol, no stevia.
• Ghost pairs maltitol with allulose (near-zero calorie and glycemic impact, excludable from added-sugar counts under FDA rules), sorbitol (another sugar alcohol, similar laxative profile to maltitol), and stevia leaf extract (zero-calorie, zero-glycemic plant sweetener). No sucralose, no Ace-K.

If avoiding sucralose specifically is the goal, Ghost is the clear winner. If minimizing total sugar-alcohol load is the goal, neither is a clean pick — Ghost's stack includes two sugar alcohols (maltitol and sorbitol) totaling 7g per pack, while Grenade uses maltitol alone but does not break out the exact gram amount on its published label data. Both bars are meaningfully more glycemic than an erythritol-based bar like Quest; see our Quest vs Barebells comparison for that lower-GI alternative.

Fiber and Format

At their best-fiber flavors, the two brands are close: Grenade's Dark Chocolate Mint and Caramel Chaos hit 6.7–7.0g, and Ghost's Chocolate Caramel and Chocolate Peanut Butter also land at 7g. Both fall well short of Quest's 12g per bar. The bigger practical difference is format: Grenade is a single 60g bar you eat in one piece, while Ghost is two individually wrapped 32.5g sticks in one labeled serving — useful if you want to split a serving across two sittings, since one stick alone delivers roughly 135 calories and 10g of protein.

Price and Where to Buy

Grenade Carb Killa 12-packs run approximately $29.50–$31.95 at Walmart, or about $2.46–$2.66 per bar. Ghost Protein Bars are priced at $9.99 for a 4-pack and $29.99 for a 12-pack, both roughly $2.50 per serving. At standard bulk pricing, the two brands cost almost exactly the same per serving. Grenade is available at Walmart, Amazon, Target, and GNC; Ghost is available at GNC, Vitamin Shoppe, Walmart, Target, Amazon, Kroger, and GhostLifestyle.com.

Which Bar Should You Buy?

Choose Grenade if…

You want the most protein for the fewest calories in a single-bar format — Caramel Chaos at 23g for 203 calories is hard to beat among candy-bar-style bars — and you don't mind an undisclosed amount of collagen in the blend.

Choose Ghost if…

Protein completeness matters more to you than raw protein-per-calorie efficiency, or you specifically want to avoid sucralose. Ghost's entire 20g comes from complete dairy sources, and its dual-stick format lets you split a serving in two.

Consider Quest if neither quite fits…

Quest beats both brands on protein efficiency relative to a collagen-free blend (21g for 190 calories, 11.1g per 100 cal) and roughly doubles their fiber at 12g per bar, using erythritol instead of maltitol. See the full breakdown in our Quest vs Barebells comparison.

Frequently Asked Questions

Which has more protein, Ghost or Grenade?

Grenade, in absolute terms and per calorie — its Caramel Chaos flavor delivers 23g of protein for 203 calories (11.3g per 100 cal) versus Ghost's 20g for 270 calories (7.4g per 100 cal). But Grenade's protein blend includes bovine collagen, an incomplete protein, while Ghost's 20g is entirely from complete dairy sources.

Does Grenade Carb Killa contain collagen?

Yes. Alongside calcium caseinate, whey protein isolate, and milk protein isolate, Grenade's blend includes bovine collagen hydrolysate. Collagen is missing tryptophan, an essential amino acid, making it an incomplete protein. Grenade does not disclose what share of its 20–23g protein claim comes from collagen.

Which bar has fewer artificial sweeteners?

Ghost avoids sucralose and Ace-K entirely, sweetening instead with maltitol, allulose, sorbitol, and stevia. Grenade uses maltitol plus sucralose. If avoiding sucralose specifically is your goal, Ghost is the better pick; neither bar is free of sugar alcohols.

Are Ghost and Grenade bars keto-friendly?

Conditionally, and it varies by flavor. Grenade's lowest-carb flavors (Caramel Chaos, Dark Chocolate Mint) run 13.5–13.6g total carbs with 6.7–7g fiber, netting to roughly 5–7g if fiber and sugar alcohols are excluded. Ghost's Chocolate Caramel has 22g total carbs, 7g fiber, and 7g sugar alcohols, netting to roughly 8g. Both use maltitol, which has a real glycemic index (~35–53) that some keto trackers count against net carbs rather than excluding — treat both as moderate, not strict, keto fits.

Which bar tastes more like a candy bar?

Both are built to eat like candy rather than a fitness supplement — Grenade uses a triple-layer nougat, caramel or cream filling, and milk chocolate coating; Ghost uses a dual-stick chocolate-coated format. Taste preference between the two comes down to flavor profile choice rather than a clear category winner.

Bottom line: Grenade Carb Killa wins on raw protein efficiency — its Caramel Chaos flavor delivers 23g of protein for 203 calories, the best ratio of the two — but that protein claim includes an undisclosed amount of incomplete collagen. Ghost delivers slightly less protein (20g) at a higher calorie cost (270 calories) but from an entirely complete, collagen-free dairy blend, and it skips sucralose in favor of allulose and stevia. Choose Grenade for the leanest protein-per-calorie math in a single-bar format; choose Ghost for complete protein quality and a sucralose-free sweetener stack. Compare both against Quest, Barebells, and eight others in our best protein bars of 2026 guide, check the diabetes-friendly field in our best protein bars for diabetics guide, or browse the full protein snacks directory.