Verified
“No artificial sweeteners, dyes, or fillers.”
The panel is sweetened with stevia, allulose and monk fruit, with no artificial sweeteners or dyes — a genuinely clean deck, rare in this category, and consistent with the marketing.
Reviewed
Verified by SAC team
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Legion · 20g whey protein · ~3g sugar · ~250 cal · 12-count
Legion Protein Bar, Chocolate Peanut Butter Review
8.5/10SAC Product Score™
Legion is the pick for anyone who wants their 20 grams of protein without the artificial-sweetener-and-dye chemistry set. It's a complete whey and milk blend sweetened only with stevia, allulose and monk fruit, built on real chicory-root prebiotic fiber, with no collagen padding and nothing artificial on the panel — a genuinely rare combination in this category. It's also third-party tested by Labdoor, which is a testing credential rather than peer-reviewed proof, but a real transparency signal. The trade-offs are straightforward: it's a premium bar at around $3.17, and at roughly 250 calories with 11 grams of fat it eats more like a real snack than a diet treat. For a clean, naturally-sweetened, complete-protein bar, it's the best of the bunch.
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Read the complete Muscle Growth guide →How we built the SAC Product Score™ — 8.5/10
Protein quality & amount35%8.4/10
20 g from a complete whey concentrate + milk isolate + whey isolate blend with no collagen padding — real, leucine-rich protein that clears the ~20 g MPS-maximizing dose (Moore 2009). Docked slightly against the higher-count leaders on amount, but the quality is top-tier.
Ingredient quality30%9.1/10
The cleanest deck in the lineup: ~3 g sugar from stevia, allulose and monk fruit, zero artificial sweeteners or dyes, real chicory-root prebiotic fiber, and Labdoor third-party testing. This is exactly what this axis rewards, and only the tiny sugar count keeps it off a perfect mark.
Value per gram of protein20%7.8/10
~$3.17/bar for 20 g is about $0.16 per gram — a premium, and the lowest value score among the top picks. You pay for the clean, naturally-sweetened, third-party-tested formulation; on raw cost, powder and whole food win as always.
Taste & texture15%8.4/10
Chocolate Peanut Butter is a solid, satisfying flavor, but at ~250 calories and 11 g fat it eats richer and denser — more of a real snack than the airy candy-bar treats above it. Good, not category-leading, on taste.
Source-provenance & label honesty0%9.5/10
Non-weighted SAC transparency gate — Legion tops it. Third-party Labdoor testing, no artificial anything, no collagen padding, and a naturally-sweetened panel that matches its marketing. Note per SAC policy: Labdoor is independent testing, not peer-reviewed evidence, but it's a genuine, verifiable transparency credential.
The product at a glance
- Protein
- 20 g (whey concentrate + milk protein isolate + whey isolate)
- Sugar
- ~3 g (stevia + allulose + monk fruit; no artificial sweeteners)
- Calories
- ~250
- Fat
- ~11 g
- Protein source
- Complete — whey/milk blend, no collagen padding
- Fiber
- Prebiotic fiber from chicory root + tapioca
- Testing
- Third-party tested (Labdoor); no artificial dyes or flavors
- Count / price
- 12-count box, ~$38 (~$3.17/bar)
Marketing claims vs. reality
Verified
“Naturally sweetened.”
Stevia, allulose and monk fruit are all non-artificial sweeteners, and at ~3 g sugar the bar is legitimately low-sugar without leaning on sucralose or heavy maltitol. The claim is accurate.
Verified
“Third-party tested (Labdoor).”
Labdoor testing is a verifiable, independent credential — a real transparency signal. Per SAC source-provenance policy we note it's third-party product testing, not peer-reviewed research, but as a testing claim it holds.
Verified
“20 g of high-quality complete protein.”
The whey/milk blend is complete and leucine-rich with no collagen padding, and 20 g clears the ~20 g MPS-maximizing dose (Moore 2009). Both the quality and amount claims check out.
What our test actually found
01The cleanest panel in the lineup
No artificial sweeteners, no dyes, no fillers, no collagen padding, and real chicory-root prebiotic fiber instead of IMO. If your objection to protein bars is the chemistry set on the back, Legion is the direct answer — and it's third-party tested to back it up.
02It eats like a snack, not a diet treat
At ~250 calories with 11 g of fat, Legion is the most calorie-dense bar among the top picks. That's a feature if you want a satisfying real-food-style snack, and a drawback if you're chasing a low-calorie treat — for that, David or Built do far more per calorie.
03The premium is real — and it's for the formulation
At ~$3.17 a bar it's near the top of the price range, and per gram of protein it's the priciest of the leaders. You're paying for the clean, naturally-sweetened, Labdoor-tested deck rather than for more protein; Quest gives you the same completeness for a dollar less.
04Labdoor testing is a credential, not proof of superiority
Third-party testing verifies that what's on the label is in the bar, which is a genuine trust signal most rivals lack. But per SAC policy it isn't peer-reviewed evidence that the bar builds more muscle — total daily protein still does that (Morton 2018).
Pros & cons, no sugar-coating
Pros
- 20 g of complete whey/milk protein with zero artificial sweeteners, dyes, or fillers
- Naturally sweetened with stevia, allulose, and monk fruit; real prebiotic fiber
- Third-party tested (Labdoor) — a transparent, no-junk formulation
- No collagen padding — the full 20 g is complete, usable protein
- Clears the ~20 g per-serving MPS-maximizing dose (Moore 2009)
Cons
- Premium price at roughly $3.17 per bar
- ~250 calories and ~11 g fat make it more of a snack than a low-cal treat
The clean-panel pick — the best bar if you want no artificial anything.
Legion is for the buyer who wants 20 grams of complete protein without the artificial-sweetener-and-dye chemistry set: a whey and milk blend sweetened only with stevia, allulose and monk fruit, built on real chicory-root prebiotic fiber, with no collagen padding and Labdoor third-party testing behind it. The trade-offs are honest — it's a premium bar at around $3.17, and at ~250 calories with 11 grams of fat it eats more like a real snack than a diet treat. For a clean, naturally-sweetened, complete-protein bar, nothing here does it better.
Check Legion · 20g whey protein · ~3g sugar · ~250 cal · 12-count on AmazonIf this doesn’t fit — try these
Quest Protein Bar, Chocolate Chip Cookie Dough
9/1021 g of complete protein at 1 g sugar for a dollar less a bar — the pick if you want Legion's completeness and don't mind sucralose in exchange for a lower price.
See it on the list →David Protein Bar, Chocolate Chip Cookie Dough
9.3/1028 g of mostly-complete protein for just 150 calories — the pick if you want far better protein-per-calorie math and can accept a maltitol binder.
See it on the list →RXBAR, Chocolate Sea Salt
7.8/10A five-ingredient whole-food bar of egg whites, dates and nuts — the pick if you want clean taken even further, at the cost of only 12 g protein and 13 g date sugar.
See it on the list →Sources & further reading
- Morton 2018Morton RW, Murphy KT, McKellar SR, Schoenfeld BJ, Henselmans M, Helms E, Aragon AA, Devries MC, Banfield L, Krieger JW, Phillips SM · 2018 · British Journal of Sports Medicine · PMID 28698222
A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults
Total daily protein (~1.6-2.2 g/kg/day) drives resistance-training gains, and supplemental protein helps only insofar as it raises that total. Legion's clean 20 g is one convenient contribution, not a muscle-builder in itself.
- Moore 2009Moore DR, Robinson MJ, Fry JL, Tang JE, Glover EI, Wilkinson SB, Prior T, Tarnopolsky MA, Phillips SM · 2009 · The American Journal of Clinical Nutrition · PMID 19056590
Ingested protein dose response of muscle and albumin protein synthesis after resistance exercise in young men
~20 g of high-quality protein maximally stimulated MPS. Legion's complete 20 g whey/milk blend lands right at that dose.
- Schoenfeld 2018Schoenfeld BJ, Aragon AA · 2018 · Journal of the International Society of Sports Nutrition · PMID 29497353
How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution
Aim for ~0.4 g/kg per meal across ≥4 meals to reach ≥1.6 g/kg/day. A clean 20 g Legion bar covers one distributed feeding toward that total.