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Whey protein comparison · Updated 4 September 2026
How ProEnergy compares to the whey proteins you are probably also looking at.
Every figure below comes from each brand’s own published information, checked on 4 September 2026. We have included the places where other people beat us, because a comparison that has us winning every row is not a comparison, it is an advert.
Our claim, and the criteria behind it
On the four things that separate a good whey isolate from a cheap one, ProEnergy leads this list.
1. Isolate, and only isolateNo concentrate or hydrolysate padding out a protein blend.
2. Grass-fed, rBGH-free milkStated plainly, not implied by a picture of a field.
3. Nothing artificial sweetening itStevia leaf, never sucralose or acesulfame potassium.
4. A label you can read in one breathFive ingredients flavored. One unflavored.
The table
Compared on the things that actually differ between whey proteins. Prices are the brand’s own list price divided by the servings in the tub, so a big tub does not look cheaper than it is.
Ingredient counts are the number of items on the label for a vanilla or chocolate flavour, counting a named blend as one item. Where a brand does not publish a price on its own site we have said so and used a major retailer instead. Flavours differ: Optimum Nutrition’s chocolate and vanilla labels list different sweeteners, and Ascent, Isopure and ProEnergy all sell an unflavored version with a shorter list than the one counted here.
What the case price does
One jar is $61.95. Order four, any mix of vanilla, chocolate and unflavored, and every jar is $54.99. That is 140 shakes for $219.96, delivered free, and it moves us from mid-table to the front of the group we actually belong in.
Per shake$1.77 becomes $1.57. That is the cheapest of the three grass-fed, naturally sweetened isolates on this page: ten per cent under Legion and twenty-eight per cent under Transparent Labs.
Per gram of protein$0.089 becomes $0.079. That pulls us level with Transparent Labs at $0.078 and past Legion at $0.080, while keeping the shortest ingredient list of the three.
What it does not doIt does not make us the cheapest protein on this page. ISO100 at $0.072 and Ascent at $0.073 are still below us. Neither of them is a grass-fed isolate with a five-item label.
Build a case of four
Where we do not come first
Three honest points before the rest of this page.
- Transparent Labs puts more protein in a scoop than we do, 28 grams against our 20, on a similarly short ingredient list. If protein per scoop is the number you care most about, they beat us on it.
- Dymatize ISO100 and Optimum Nutrition Gold Standard cost less per gram of protein. Both are made at a scale we will never reach. If you are buying on price per gram, they win.
- We do not carry a product-level sport certification. Our manufacturing facility is certified to NSF/ANSI 455-2, the third-party GMP standard for dietary supplements, and our formulas are independently lab tested, but that is an audit of how the powder is made, not a test of each finished batch for banned substances. Ascent and Transparent Labs carry Informed Sport or Informed Choice, and Legion publishes Labdoor results. If you are drug tested in competition, that difference is a real one and it counts against us.
- Naked Whey has the same single-ingredient honesty we do in our unflavored jar. The difference is that theirs is a whey concentrate and ours is an isolate, which is a real difference in processing and lactose, not a marketing one.
What the table is really showing
Isolate is not the defaultThe best-selling whey in the country is a blend of isolate, concentrate and hydrolysed whey, and the label does not tell you the ratio. If you are paying for isolate, check that isolate is the only protein listed. Most of them are sweetened with sucraloseFour of the eight use sucralose, acesulfame potassium, or both. That is a preference, not a safety question, but if you would rather not drink it every morning, it narrows the field quickly. Grass-fed is a claim, not a standardOnly four of the nine here claim it at all, and only Legion names an independent certifier. Ours is grass-fed and rBGH-free; we say so plainly and we do not dress it up as a certification we do not hold.
How to read any whey label in four steps
1 Divide the protein by the scoopTwenty grams of protein in a twenty-five gram scoop is eighty per cent protein by weight. Do that sum on any tub and you will know in seconds how much of what you are buying is actually protein. 2 Read the first ingredient, then count the restThe first ingredient is the product. Everything after it is flavour, texture or sweetener. A list of five is not automatically better than a list of eight, but it is easier to understand, and you should be able to say what each item is doing. 3 Work out the cost per serving, not per tubTubs come in wildly different sizes and serving counts. List price divided by servings is the only number that compares. Then divide again by grams of protein if you want to be strict about it. 4 Check who you would callAsk what happens if the jar arrives damaged or you simply do not like it. Our answer is thirty days, opened jars included, and a phone number a person answers. Ask the same question of anyone else on this list before you buy.
See ProEnergy whey protein Whey Protein 101 →
About these figures. All of it was taken from each brand’s own website, or from a major retailer where the brand does not publish the detail, and checked on 4 September 2026. Supplement formulas, tub sizes and prices change often, and flavours within one brand frequently differ from each other, so treat this as a snapshot and read the label on the tub in front of you before you buy. If you spot something here that has gone out of date, tell us at customerservice@energyfirst.com and we will correct it. All product names and trademarks belong to their respective owners; none of these companies is affiliated with EnergyFirst, and mentioning them here is not a claim of endorsement in either direction. These statements have not been evaluated by the Food and Drug Administration. EnergyFirst products are not intended to diagnose, treat, cure or prevent any disease.
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