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Supplements · Vitamins, minerals, nootropics & protein

The best protein powders of 2026

Protein powder, ranked on the one thing you can check for yourself: whether the exact tub you are buying is listed in a banned-substance certifier's own public database.

Three registers are public and searchable, and between them they settle this whole category: NSF Certified for Sport at nsfsport.com, and Informed Sport and Informed Choice at wetestyoutrust.com. What they show is that the certificate belongs to a tub, not to a brand. It is pinned to a flavor and to a container size, and step outside either one and you have stepped outside the certificate. The clearest example is on this page: Myprotein is in both registers, and neither entry covers the product a US buyer actually puts in their basket.

Last updated
July 14, 2026
How we rank: published specs, third-party certifications, and what verified buyers report.
§ 01 · Top 5 Rankings

Our top 5 picks for protein powders

As an Amazon Associate I earn from qualifying purchases.

#1
EDITOR'S CHOICE
Optimum Nutrition Gold Standard 100% Whey, Double Rich Chocolate, 10 lb
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Optimum Nutrition

Optimum Nutrition Gold Standard 100% Whey, Double Rich Chocolate, 10 lb

9.6/10JellyReviews Score

The most-owned protein powder in America turns out to also be the easiest to verify, and almost nobody does it. Go to nsfsport.com, search Optimum Nutrition, and the entry is right there: Gold Standard 100% Whey, Double Rich Chocolate, 4.53 kg, tested at 24 g of protein and 3 g of carbohydrate per 30.4 g scoop. That is the 10 lb tub, in that flavor, and nothing else. Two things follow. The certificate is worth more than the marketing, because it comes from someone with no incentive to flatter the product. And the size and the flavor are part of the certificate, not decoration around it.

Pros
NSF lists it by name, by flavor and by container: "GOLD STANDARD 100% WHEY DOUBLE RICH CHOCOLATE", package size 4.53 kg, which is the 10 lb tub linked here
NSF also publishes the nutrition it tested, so you do not have to take the label's word for it: 24 g of protein per 30.4 g scoop, 3 g of carbohydrate, 1 g of sugar
Whey isolate is the primary ingredient, with the carbs and fat filtered out, so the blend leans toward isolate rather than away from it
Roughly 99,000 ratings, more owner feedback than the other four on this page put together
Cons
The certificate is flavor-specific, and NSF lists exactly two: Double Rich Chocolate and Vanilla Ice Cream. Pick any of the other twenty flavors and you are outside the listing
It is a 10 lb tub, because that is the size NSF tested. The 5 lb tub of the same flavor is not the container in the register
Optimum Nutrition does not mention NSF anywhere on the Amazon listing, so the strongest thing about this product is something you have to go and look up yourself
Where to buy
Amazon
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We may earn a commission from this link.
#2
PUREST BY WEIGHT
Transparent Labs Grass-Fed Whey Protein Isolate
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Transparent Labs

Transparent Labs Grass-Fed Whey Protein Isolate

9.4/10JellyReviews Score

Protein by weight is the number that separates a protein powder from a bag of sugar with protein in it, and Transparent Labs is one of the very few brands that will print theirs: 87%. Most competitors quote grams per scoop, which tells you nothing until you know how big the scoop is and what else is in it. On top of that, NSF lists more than twenty of its flavors by name, which is the broadest certified range here. The catch is commercial rather than nutritional. Amazon carries this only inside bundles, so the button below goes to Transparent Labs, and it earns us nothing.

Pros
NSF lists the whey isolate in more than twenty flavors, which is by far the widest certified flavor range on this page
Transparent Labs publishes the number that actually decides how good a protein powder is, and hardly anyone else does: 87% protein by weight
28 g of protein per serving, the highest of the whey products here
No artificial sweeteners, food dyes or fillers, and the whey comes from grass-fed cattle
Cons
There is no clean way to buy it on Amazon. Every Transparent Labs whey listing we opened was a multi-product bundle, so the link below goes to Transparent Labs instead
Two sizes only, 2 lb and 4 lb, against ten or more from Optimum Nutrition
JellyReviews earns nothing if you buy this. We have no affiliate relationship with Transparent Labs, and we would rather point you at the right product than at a worse one that pays
Where to buy
Transparent Labs
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#3
BEST PLAIN ISOLATE
NOW Foods Sports Whey Protein Isolate, Unflavored, 1.2 lb
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NOW Foods

NOW Foods Sports Whey Protein Isolate, Unflavored, 1.2 lb

9.1/10JellyReviews Score

The quiet one, and the best-value protein on this page once you do the arithmetic nobody does. NOW Foods is a bulk supplement house with no athlete endorsements and no flavor of the month, and it is sitting in Informed Sport's register anyway, the same banned-substance program the sponsored brands pay for. The badge is even printed on the tub. It just never appears on the Amazon listing. Then look at the panel: 24 g of protein in a 28 g scoop, which works out at 86% protein by weight, one point behind Transparent Labs and a long way behind it in price. If you put protein into food rather than into a shaker, unflavored is the feature and not the compromise.

Pros
Informed Sport's register lists NOW Sports Whey Protein Isolate, the badge is printed on the tub, and NOW still does not mention it anywhere on the Amazon listing where people actually buy it
NOW publishes the panel: 24 g of protein in a 28 g scoop. That is 86% protein by weight, within a point of the most expensive product on this page
1 g of carbohydrate and 0 g of fat per serving, because there is essentially nothing in the tub but isolate
Unflavored, so it goes into oatmeal, coffee or a smoothie without turning the whole thing into a milkshake
Cons
Amazon's own title for this product says 25 g of protein. NOW's supplement facts panel says 24 g. Believe the panel
Unflavored means unflavored. In plain water it is not a pleasant drink, and nobody should pretend otherwise
19 servings in the 1.2 lb tub, the smallest container here, so it runs out fast
Where to buy
Amazon
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#4
BEST PLANT-BASED
Garden of Life Organic Vegan Sport Protein, Chocolate, 2.01 lb
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Garden of Life

Garden of Life Organic Vegan Sport Protein, Chocolate, 2.01 lb

9/10JellyReviews Score

The plant-based pick, and the only product here whose brand actually tells you it is certified. Garden of Life prints NSF Certified for Sport on the listing, and the register backs it: Organic Plant-Based Performance Protein, Chocolate, United States, 30 g of protein per 44 g serving. That is more protein per serving than any whey on this page, drawn from peas, navy beans, lentils and garbanzo beans so the amino acid profile does not have a hole in it. Note that Garden of Life sells this tub as 840 g net while Amazon lists it at 2.01 lb, and NSF certifies both 840 g and 912 g, so the certificate covers you either way. The 8 g of carbohydrate is the honest cost of getting protein out of a plant, and the register prints that too.

Pros
NSF lists it as "Organic Plant-Based Performance Protein", Chocolate, country of sale United States, and certifies it at 531 g, 840 g and 912 g, which covers the tub linked here whichever way you weigh it
30 g of protein per 44 g serving, the highest of the five, from peas, navy beans, lentils and garbanzo beans
Garden of Life is the only brand here that prints its certification on the listing itself: USDA Organic, NSF Certified for Sport, Non-GMO Project Verified
NSF records it free of dairy, soy, gluten, GMOs, added sugar, tree nuts, and every artificial color, flavor, preservative and sweetener
Cons
NSF records 8 g of carbohydrate per serving, the most on this page, because plant protein arrives with the plant attached
19 servings per tub, so a 2 lb container of this does not last as long as 2 lb of whey
Read the register carefully. NSF also lists an "Organic Plant-Based Protein" with no "Performance" in the name, and some of those entries are Canada only. They are not this product
Where to buy
Amazon
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#5
Myprotein Impact Whey Protein
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Myprotein

Myprotein Impact Whey Protein

8.4/10JellyReviews Score

This is the product that made the page worth writing. Myprotein is in both of LGC's registers, which sounds like the end of the story until you read the entries. Informed Sport lists Impact Whey Protein Elite, a different SKU. Informed Choice lists Impact Whey Isolate, and prints the scope alongside it: Global excluding USA and Canada. The plain Impact Whey Protein a US buyer is offered is in neither. That is not an accusation of anything, and the powder may well be fine. It is simply that the certification a US shopper thinks they are getting is not attached to the thing they are buying, and you can only find that out by opening the register.

Pros
Myprotein appears in both LGC registers, so the company does put products through banned-substance testing rather than just talking about it
The widest flavor range of any brand on this page, by a distance
Sold direct, so the product page is the manufacturer's own and there is no reseller between you and the label
Cons
The certified products are not this one. Informed Sport lists "Impact Whey Protein Elite". Informed Choice lists "Impact Whey Isolate", and scopes that entry "Global excl. USA & CAN". Plain Impact Whey Protein, sold to a buyer in the United States, is in neither entry
That scope line is the entire reason this ranks fifth. A US shopper who sees Informed Choice in Myprotein's marketing is reading about a product that is not the one in their basket, and nothing on the page tells them so
JellyReviews earns nothing if you buy this either. There is no affiliate relationship here
Where to buy
Myprotein
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§ 02 · Side-by-side comparison

Compare all 5 at a glance

RankProductBrandScoreBest for
#1Optimum Nutrition Gold Standard 100% Whey, Double Rich Chocolate, 10 lbOptimum Nutrition9.6EDITOR'S CHOICE
#2Transparent Labs Grass-Fed Whey Protein IsolateTransparent Labs9.4PUREST BY WEIGHT
#3NOW Foods Sports Whey Protein Isolate, Unflavored, 1.2 lbNOW Foods9.1BEST PLAIN ISOLATE
#4Garden of Life Organic Vegan Sport Protein, Chocolate, 2.01 lbGarden of Life9BEST PLANT-BASED
#5Myprotein Impact Whey ProteinMyprotein8.4-
§ 03 · Buying guide

How to choose the right protein powder

01The certificate belongs to a tub, not to a brand

This is the single most useful thing on this page, and every register on the internet will confirm it in about a minute. NSF does not certify Optimum Nutrition. It certifies "GOLD STANDARD 100% WHEY DOUBLE RICH CHOCOLATE" at a package size of 4.53 kg. That is one flavor, in one container. Optimum Nutrition sells more than twenty flavors and at least six sizes, and NSF lists two of the flavors.

The same shape appears everywhere once you look for it. NSF lists Garden of Life's plant protein at 531 g, 840 g and 912 g, so the 2.01 lb tub is inside the certificate and a different tub might not be. Some of its neighbouring entries are marked "(Canada)", which means the certificate does not describe what is sold in an American shop.

So the check is not "is this brand certified". It is: open the register, find the flavor, find the container size, and see whether the thing in front of you is the thing that was tested. It takes a minute and it is the only part of this that a marketing department cannot write for you.

02There are three registers, and they do not overlap

NSF Certified for Sport publishes at nsfsport.com, searchable by brand, with a detail page for every product giving the flavor, the container sizes, the serving size and the tested macros. Informed Sport and Informed Choice are both run by LGC and publish at wetestyoutrust.com. Informed Sport is the stricter program, aimed at elite athletes who get tested; Informed Choice is the retail-facing one.

A product missing from one register may be sitting in another, and this trips people up constantly. Dymatize ISO100 is nowhere in NSF's database. It is listed by name in Informed Choice's, marked "(USA)". Anybody who checked only NSF would have concluded ISO100 was uncertified and been wrong, and that mistake, published, is a slur on a product that did the work.

Which is the general rule for this whole category, and for reviews of it: an absence is the hardest thing in the world to verify. Before you believe that a product lacks a certification, make sure somebody actually looked in every place it could be.

03What the certification does and does not buy you

It buys you one thing: the batch was screened for substances banned in sport. It is a contamination check, not a quality award. It says nothing about whether the protein tastes good, absorbs well, or is worth the money, and a certified powder can still be an overpriced, badly flavored one.

It matters most if you are drug-tested, because supplement contamination is a real and well-documented way for a career to end over something nobody meant to take. If you are not drug-tested, the honest case is weaker but not zero: a company that pays for batch testing and lets an outsider publish the results is telling you something about how it runs its factory.

What decides whether a powder is good is a number most brands will not print: protein as a percentage of weight. Grams per scoop is meaningless without the size of the scoop. Transparent Labs publishes 87%. Look for that figure, and notice how rarely you find it.

§ 04 · FAQ

Questions about protein powders

No, and this is worth being clear about. NSF Certified for Sport and Informed Sport are contamination checks: the batch was screened for substances banned in sport. They are not quality awards. A certified powder can taste bad, mix badly, and cost too much. What the mark tells you is that somebody outside the company opened a tub, tested it, and published the result under their own name.

It is certified. Informed Choice lists "ISO100 Hydrolyzed Protein Powder (USA)" by name, and we would have got this wrong if we had checked only NSF, where it does not appear. ISO100 is not here for a purely commercial reason: we could not find a clean listing to send you to. We scanned 21 Amazon results and the four ISO100 listings were all multi-product bundles, packed with casein or a second flavor. The same is true of Vega Sport Premium Protein, which is NSF certified and also sold on Amazon only inside bundles. Both are good products with nowhere clean to buy them.

Concentrate is roughly 70 to 80 percent protein by weight, with the lactose, fat and carbohydrate still in it. Isolate is filtered further, usually above 90 percent, with most of the lactose gone, which is what makes it the safer pick if dairy sits badly with you. Hydrolysate is isolate that has been partly broken down already, which speeds absorption a little and costs a lot. For anyone who is not being paid to train, the difference between isolate and hydrolysate is not worth the money. The difference between a 90 percent product and a 70 percent one is.

The RDA for a sedentary adult is 0.8 g per kg of bodyweight, which is a floor for avoiding deficiency rather than a target for building anything. The International Society of Sports Nutrition position stand puts 1.4 to 2.0 g per kg as the range that supports muscle growth in people who train. For a 75 kg lifter that is roughly 105 to 150 g a day. Most of that should be food. A scoop of powder is a convenient way to close a gap, not a reason to open one.

Not reliably, and that is the interesting part. On this page the certified products span the full price range, and the brand with the loudest marketing is not the one with the most certified flavors. Certification is a fixed cost a manufacturer chooses to pay, so it tracks how a company runs its plant far more closely than it tracks what it charges you.

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The verdict

Open the register before you open your wallet, because on this page it changes the answer three times. Optimum Nutrition takes the top slot because NSF lists Gold Standard by flavor and by container, and the container is the 10 lb Double Rich Chocolate tub, so you can confirm exactly what you are buying in under a minute on a site that does not sell you anything. Transparent Labs is the purest thing here by the only measure that counts, 87% protein by weight, and it publishes the figure when almost nobody else will. NOW Foods is in Informed Sport's register and never mentions it. Garden of Life is the only brand that prints its certification where a buyer can see it, and it is also the highest protein per serving on the page. And Myprotein is the reason to check at all: it is in both registers, and neither entry covers the tub a US buyer is sold.

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