Lab-tested protein percentage, BCAAs, mixability, and clean digestion.
Sam CarterHealth, Fitness & Performance Editor
Winner
ON Gold Standard 100% Whey
Overview
Protein supplements aid muscle recovery post-workout. We sent protein powders to third-party labs to test for macro accuracy, heavy metal purity, amino acid spiking, texture mixability, and flavor.
Winner spotlight
№1Optimum Nutrition Gold Standard 100% Whey remains the gold benchmark of protein powders. Delivering 24g of pure whey isolate/concentrate blend per scoop with instantized mixability in water and 40+ years of trusted purity.
At a glance
| Pick | #1 ON Gold Standard 100% Whey $65 / 5lb · 24g Protein | #2 Dymatize ISO100 $79 / 5lb · Hydrolyzed WPI | #3 Transparent Labs Grass-Fed $60 / 30 Servings | #4 Ghost Whey Protein $45 / 2lb · Cereal Flavors | #5 Legion Whey+ $60 / 30 Servings | #6 Naked Whey $95 / 5lb · 1 Ingredient | #7 PlantFusion Complete Plant $40 / 30 Servings |
|---|---|---|---|---|---|---|---|
| Score | 9.8 | 9.7 | 9.8 | 9.5 | 9.6 | 9.4 | 9.2 |
| Performance | Elite | Excellent | Great | Very good | Good | Good | Fair |
| Durability | Excellent | Excellent | Great | Great | Good | Good | Fair |
| Comfort | Exceptional | Excellent | Very good | Good | Good | Good | Fair |
| Value | Fair | Good | Good | Great | Great | Excellent | Excellent |
The list
Ordered by overall score across every test. The “best for” note tells you exactly who each pick is for.
1The world's best-selling whey protein with 24g protein and instant mixability.
Best overallWhy buy
Keep in mind
2100% Hydrolyzed Whey Isolate for fast digestion, 25g protein, and zero fat.
Fast digestion isolateWhy buy
Keep in mind
3100% grass-fed whey isolate with zero artificial sweeteners, food dyes, or fillers.
100% grass-fed & cleanWhy buy
Keep in mind
4Transparent label blend featuring iconic licensed flavors like Cinnabon and Oreo.
Best flavor experienceWhy buy
Keep in mind
5Naturally sweetened grass-fed whey isolate sourced from small Irish dairy farms.
Naturally sweetened isolateWhy buy
Keep in mind
6Single ingredient: 100% grass-fed unflavored whey with zero added ingredients.
Single-ingredient purityWhy buy
Keep in mind
7Pea, artichoke, and algae plant protein blend with digestive enzymes.
Vegan plant proteinWhy buy
Keep in mind
Deep dive
| Feature | ON Gold Standard 100% Whey | Dymatize ISO100 | Transparent Labs Grass-Fed | Ghost Whey Protein | Legion Whey+ | Naked Whey | PlantFusion Complete Plant |
|---|---|---|---|---|---|---|---|
| Lightweight | |||||||
| Breathable | |||||||
| Reflective details | |||||||
| Wide sizing | |||||||
| Carbon plate | |||||||
| Machine washable | |||||||
| Recycled materials | |||||||
| Long warranty |
The verdict
Before you buy
Every product was worn or used through a full 12-week training block. We measure performance, durability and the small details that only show up after week three — seams, straps, soles and support.
The best gear is the gear you'll actually use at 6am. Comfort and ease of use beat marginal performance gains every time — and a longer warranty is worth more than a flashier spec.
The winner of our The 7 Best Protein Powder Brands Tested ranking is the pick that scored highest across every test — but 'best overall' isn't always 'best for you'. Use the 'Best for' note under each of the seven to match a pick to your budget, your space and your habits. Every entry on this list earned its place; the ranking simply tells you where to start.
Questions
A minimum of 12 weeks of real training. Running shoes need at least 100 miles; gear that survives a full training block earns its place.
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