
Transparent Labs
100% Grass-Fed Whey Protein Isolate
A grass-fed whey isolate with 28 g of protein per scoop, stevia instead of artificial sweeteners, and NSF Certified for Sport status.
Top picks
Ranked by our five-factor score — evidence, purity, value, experience and transparency.

Transparent Labs
A grass-fed whey isolate with 28 g of protein per scoop, stevia instead of artificial sweeteners, and NSF Certified for Sport status.

Optimum Nutrition
The benchmark whey blend: 24 g of protein per 120-calorie scoop, Informed Choice certified, and a flavor lineup few rivals can match.
An all-isolate whey with a hydrolyzed fraction: 25 g protein and about 2.7 g leucine per 120-calorie scoop, with Informed Choice testing.
28 products · page 1 of 2

Transparent Labs
A grass-fed whey isolate with 28 g of protein per scoop, stevia instead of artificial sweeteners, and NSF Certified for Sport status.

Optimum Nutrition
The benchmark whey blend: 24 g of protein per 120-calorie scoop, Informed Choice certified, and a flavor lineup few rivals can match.
An all-isolate whey with a hydrolyzed fraction: 25 g protein and about 2.7 g leucine per 120-calorie scoop, with Informed Choice testing.

A naturally sweetened whey isolate from Truly Grass Fed-certified Irish milk, with Labdoor certification and batch lab reports linked online.

Optimum Nutrition
A slow-digesting micellar casein with 24 g of protein per scoop for bedtime or long gaps between meals; thick, filling and fairly priced.

Vega's sport protein, formerly Vega Sport Premium Protein: 30 g plant protein, tart cherry and a probiotic per scoop, NSF Certified for Sport.

Garden of Life
A 30 g vegan protein built for athletes: organic pea and bean proteins, NSF Certified for Sport, plus recovery botanicals and a probiotic.

Myprotein
Juice-style clear whey: 20 g protein in an 80-calorie, sugar-free scoop with Informed Choice certification, though foaming and flavor split reviews.

Sports Research
Single-ingredient bovine collagen with a full amino acid profile on the label, NSF Certified Gluten-Free; 11 g scoops make the dose flexible, and it is a TikTok Shop staple.

Momentous
A premium grass-fed whey isolate with 20 g of protein per 90-calorie scoop, NSF Certified for Sport status and a short, gum-free ingredient list.

Doctor's Best
A long-running Amazon favorite: 200 mg of fully chelated magnesium per serving that is easy on the gut, but the tablets are large and the full label dose exceeds the UL.

Naked Nutrition
A one-ingredient grass-fed whey concentrate: 25 g protein per 30 g serving with no sweeteners or additives; plain-tasting and best blended.

Transparent Labs
A double-certified creatine stack with 5 g creatine plus 1.5 g HMB. The quality is excellent, but at about $1.67 a serving you pay a lot for add-ons with modest evidence.

GHOST
The cereal-and-dessert flavor king: a fully disclosed whey blend with 25 g protein per scoop, but no third-party certification and a premium price.

A true zero-carb whey isolate: 25 g of protein plus a broad vitamin and mineral blend in a 110-calorie scoop, at a price above most rivals.

Premier Protein
Amazon's best-selling protein shake: 30 g of milk protein for 160 calories at about $2 a shake, but too light to replace a full meal on its own.

Pedialyte
The pharmacy-standard rehydration mix: 260 mg sodium, 180 mg potassium and 6 g sugar per 8 oz packet. Dependable when sick, but pricey per ounce.

A budget USDA Organic vegan blend with 21 g protein and 7 g fiber per serving; a 2026 heavy-metals lawsuit against Costco is a key caveat.

A doctor-developed, ORS-style mix with 330 mg sodium per 8 oz, one of the stronger drinks in its class, backed by a small randomized trial. Pricier than it looks.

A creamy, lactose-free 26 g milk protein shake built for workout recovery; buyers love the taste, but at $3.50-$3.90 a bottle it's a pricey meal stand-in.

1,000 mg sodium, 200 mg potassium and 60 mg magnesium with zero sugar. Excellent for heavy sweaters and low-carb eaters, but far more salt than most desk workers need.

Nutricost
A budget EAA powder at about $0.67 a serving that includes all nine essential amino acids, but 6 of its 8 g are BCAAs and several others are only token amounts.

Optimum Nutrition
A hugely popular caffeinated amino drink: 100 mg natural caffeine plus a 5 g proprietary amino blend led by taurine, glutamine and arginine, so EAA doses are unknown.

Liquid I.V.
America's best-known electrolyte stick: 560 mg sodium, 370 mg potassium and 11 g sugar per packet. Handy for sweaty days, but pricey and sugary for everyday sipping.

Most people don't need electrolyte powders, but some do. Learn how much sodium you lose in sweat, how oral rehydration works, and when a high-sodium mix makes sense.
Nutrition Reviews Editorial Team · Sep 28, 2026

From the 0.8 g/kg RDA to the new 1.2–1.6 g/kg guideline: daily protein targets by goal, grams by body weight, per-meal timing, and advice for aging, dieting and vegans.
Nutrition Reviews Editorial Team · Sep 28, 2026

What USP, NSF and Informed Sport seals actually test, how to verify a certification in two minutes, how to read a certificate of analysis, and where testing stops.
Nutrition Reviews Editorial Team · Sep 28, 2026
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