Legion Whey+ Isolate Review: Grass-Fed Protein, Batch-Tested

Legion Whey+ is a grass-fed, cold-processed whey isolate that competes on transparency: the brand publishes third-party lab results instead of asking you to take the panel on faith. It lists 22 g of protein per scoop (a few flavors reach 24 g), sells a 2 lb, 30-serving tub for $59.99, and works out to $2.00 a serving. Run that against the grams and you get $1.82 per 20 g of protein — solid, though not the best value on our board, because 22 g per scoop is a touch lean for an isolate at this price.

That is the honest headline. Legion Whey+ is a genuinely clean, well-documented isolate, and it costs the same per serving as rivals that pack more protein into each scoop. If your appetite is smaller and you are trying to keep protein intake up in less food, the isolate format helps — 22 g in about 130 calories is protein-dense and low-volume. But how much protein you should target is a number for you and your clinician, not a scoop. This is not medical advice.

The label check

Using the Chocolate flavor as the reference:

• Protein per serving: 22 g from a ~31 g scoop (some flavors list 24 g). That is roughly 70% protein by weight — respectable, but below the 80%+ that the leanest isolates hit.
• Calories / carbs / fat: about 130 calories, ~2 g carbohydrate, ~1 g fat. Lactose-free and gluten-free.
• $ / serving: $2.00.
• $ / 20 g protein: $1.82. Method: $2.00 ÷ 22 g × 20.
• Sweetener system: stevia and erythritol (monk fruit in some flavors). No artificial sweeteners, no dyes, no added sugar.
• Third-party testing: yes, with a caveat. Legion states each product is tested in an ISO 17025-accredited third-party lab and has a Labdoor testing history; the brand publishes results for heavy metals, microbes, and label accuracy. What it does not carry is an Informed Sport batch certification like Transparent Labs. Publishing lab results and holding a per-batch sport certification are related but different things — our third-party testing guide explains the distinction.

That 70%-protein-by-weight figure is worth pausing on, because it is where the value gap comes from. The leanest isolates are 80% or more protein by weight, which is how they fit 28 g into a scoop barely larger than Legion's 22 g one. For a smaller-appetite shopper, protein density per scoop is the whole game: fewer grams of powder standing between you and your target means less to drink and less to digest. Legion's scoop is dense enough to matter, just not the densest on the shelf — a meaningful distinction when you are paying the same $2.00 either way.

Legion's whole pitch is disclosure: no proprietary blends, published amino acid profiles, and lab documentation you can actually read. "Cold-processed" refers to how the whey is filtered — a low-heat method the brand argues protects the protein — and "grass-fed" is a sourcing claim about the dairy, not a nutrition one. Neither changes the grams on the panel, so we treat them as nice-to-haves rather than reasons to pay more. On the ingredient side there is little to argue with; the debate is purely about grams and dollars.

Pricing

Legion runs a subscribe-and-save program and backs the product with a money-back guarantee; the exact subscription percentage moves, so confirm it at checkout. Even discounted, this sits in premium territory — and because each scoop carries fewer grams than some same-priced rivals, its price per 20 g stays higher. See the ranked field in our protein-per-dollar league table.

Here is the arithmetic in a real context. Suppose your clinician-confirmed protein target left you wanting 60 g from powder across a day: that is roughly three scoops, about 66 g of protein, for around $6.00. Powder is a supplement to food, not a replacement for it, and no isolate is meant to carry a whole day's protein alone — but that is the useful way to think about cost, in dollars per day toward a target, not dollars per tub. The target itself is a medical decision; we only supply the multiplication. If you want to buy it, you can check the current price at Legion.

How it stacks up on the shelf

At the same $2.00 a serving, Transparent Labs lists 28 g of protein to Legion's 22 g, which drops Transparent Labs to $1.43 per 20 g versus Legion's $1.82. So on pure protein value, Transparent Labs wins, and it also carries the stronger Informed Sport batch mark. Legion counters with published lab documentation and a sweetener system some people prefer. Neither is a blowout; it is a real trade between "more protein per dollar plus a batch certification" and "full lab transparency plus a stevia-and-erythritol build." We settle it spec by spec in Legion Whey+ vs Transparent Labs, and the whole category is ranked in our best protein powders roundup.

What the label does not tell you

The panel is honest about grams, cost, and contaminants, but no label can tell you three things that decide whether Legion is right for you. It cannot tell you how it tastes — that is subjective, and broad user consensus rates the stevia-and-erythritol build as pleasant but less sweet than sucralose-forward powders, which some people prefer and others do not. It cannot tell you how your gut will handle it, though an isolate is lower in lactose than a concentrate. And it cannot tell you whether 22 g fits your day; only your target math can do that. A good label narrows the decision to the things you actually have to test yourself.

Who it is for, who should pass

It fits if you value published third-party lab results over marketing, want a grass-fed, lactose-free isolate, and prefer a stevia-and-erythritol sweetener build. It is a natural pick for the shopper who reads certificates of analysis, distrusts proprietary blends, and is willing to pay a premium for a company that shows its documentation. If you already keep your protein high in small volume because appetite is lower, a clean isolate like this slots in neatly alongside whole-food protein.

Pass if you want the most protein per dollar — a leaner-scoop isolate beats it outright on that single metric. Pass if you need an Informed Sport batch certification specifically, since Legion publishes lab results but does not carry that mark. And pass if you react poorly to sugar alcohols: Legion uses erythritol, and while most people tolerate it, a minority report that sugar alcohols do not sit well.

The honest cons

• 22 g per scoop is lean for the price. Same $2.00 a serving as rivals, fewer grams, so a worse $ / 20 g.
• No Informed Sport batch mark. Legion publishes lab results, which is strong, but it is not the same as a per-batch sport certification.
• Erythritol. It is a sugar alcohol; broad user consensus is that most people tolerate it fine, but a minority report GI sensitivity to sugar alcohols generally. That is aggregated user feedback, not our test.
• Premium price. Value-tub whey undercuts it substantially on dollars.

Common questions

How much protein is in a scoop? 22 g in most flavors, up to 24 g in a few.

Is it third-party tested? Yes — Legion publishes third-party lab results and has a Labdoor testing history. It does not carry an Informed Sport batch certification.

Isolate or concentrate? Isolate. If you are unsure why that matters for cost and lactose, see isolate vs concentrate.

Does the isolate format help on a smaller appetite? It can, in the practical sense that more protein per calorie means less volume to consume. That is a fit, not a health claim — set the target with your clinician first.

Verdict recap

Legion Whey+ earns its reputation on documentation: 22 g of protein per scoop, $2.00 a serving, $1.82 per 20 g, a stevia-and-erythritol panel, and published third-party lab testing (without an Informed Sport batch mark). Buy it if transparency and a clean isolate are your priorities; look elsewhere if you want the lowest price per gram or a specific sport certification. It is a very good product carrying a slightly-below-average value score, and knowing exactly why is the whole reason we run the numbers.

Weigh it head-to-head in Legion Whey+ vs Transparent Labs, and turn your bodyweight into a protein number with the protein target calculator. This is not medical advice — confirm any target with your clinician.