Best Clean Protein Powders: No Artificial Junk
The best clean protein powders ranked by category. Grass-fed whey, organic plant protein, and casein picks with real specs, real prices, and zero fillers.
Most protein powders are loaded with artificial sweeteners, thickeners, and ingredients you can’t pronounce. Finding one that’s clean, effective, and doesn’t taste like chalk takes real digging.
We tested and researched dozens of options. These are the best clean protein powders by category — grass-fed whey, organic plant, and casein — with real specs and no marketing fluff.
Quick Comparison
| Protein | Type | Protein/Serving | Calories | Sugar | Clean Cert | Price |
|---|---|---|---|---|---|---|
| Transparent Labs Whey Isolate | Grass-Fed Whey | 28 g | 120 | 0 g | Informed Sport | $60 / 30 srv |
| Momentous Essential Whey | Grass-Fed Whey | 24 g | 130 | 1 g | NSF Certified | $56 / 25 srv |
| Legion Whey+ | Grass-Fed Whey | 22 g | 110 | 0 g | Informed Sport | $40 / 30 srv |
| Naked Whey | Grass-Fed Whey | 25 g | 120 | 3 g | None (3 ingredients) | $90 / 76 srv |
| ON Gold Standard | Whey Blend | 24 g | 120 | 1 g | Informed Choice | $33 / 24 srv |
| Garden of Life Raw Organic | Organic Plant | 22 g | 130 | 0 g | USDA Organic | $42 / 28 srv |
| Orgain Organic Protein | Organic Plant | 21 g | 150 | 0 g | USDA Organic | $28 / 20 srv |
| KOS Organic Plant Protein | Organic Plant | 20 g | 170 | 1 g | USDA Organic | $40 / 28 srv |
Best Whey Protein Powders
Transparent Labs 100% Grass-Fed Whey Isolate
Best Overall Whey · $60 / 30 servings · 28 g protein · 120 cal · Informed Sport Certified
Pure whey isolate from grass-fed cows with zero artificial sweeteners — sweetened with stevia and monk fruit. 28 g of protein per scoop with virtually no fat or carbs. Informed Sport certified, meaning every batch is tested for banned substances. Mixes clean with no clumps.
What we love:
- 28 g protein per scoop — highest on this list
- Zero artificial sweeteners, colors, or preservatives
- Informed Sport certified for competitive athletes
- Excellent mixability and flavor range (chocolate peanut butter is the standout)
Best for: Athletes and anyone who wants maximum protein with minimum junk
Momentous Essential Grass-Fed Whey
Best NSF Certified · $56 / 25 servings · 24 g protein · 130 cal · NSF Certified for Sport
The protein trusted by NFL, NBA, and MLB teams. NSF Certified for Sport is the gold standard in third-party testing. Grass-fed whey concentrate with a short, clean ingredient list. Slightly creamier texture than isolate due to the concentrate base.
What we love:
- NSF Certified for Sport — highest level of third-party testing
- Used by professional sports organizations
- Grass-fed, hormone-free whey concentrate
- Rich, creamy texture that mixes well in smoothies
Best for: Competitive athletes who need verified clean supplements
Legion Whey+
Best Tasting Clean Whey · $40 / 30 servings · 22 g protein · 110 cal · Informed Sport
Legion publishes every ingredient and dose on the label — no proprietary blends. Naturally sweetened with stevia and erythritol. Whey isolate from Irish grass-fed cows. The flavor quality is genuinely impressive for a clean protein.
What we love:
- Full ingredient transparency — no proprietary blends
- Irish grass-fed whey isolate
- Best flavor lineup in the clean protein category
- Informed Sport certified
Best for: People who’ve given up on clean protein tasting good
Naked Whey
Most Minimal · $90 / 76 servings · 25 g protein · 120 cal · 3 ingredients total
Three ingredients: grass-fed whey concentrate, sunflower lecithin, nothing else. No sweetener, no flavor, no filler. This is protein in its purest form. The unflavored version is ideal for smoothies where you control every ingredient.
What we love:
- Only 3 ingredients — the shortest label you’ll find
- $1.18 per serving (excellent value at scale)
- Grass-fed, cold-processed whey
- Unflavored — perfect for smoothies and recipes
Best for: Minimalists who want nothing between them and protein
Optimum Nutrition Gold Standard Whey
Best Widely Available · $33 / 24 servings · 24 g protein · 120 cal · Informed Choice
The bestselling protein powder in the world for a reason. Consistent quality, great mixability, available everywhere. It’s a whey blend (isolate + concentrate + peptides), and the flavored versions do contain artificial sweeteners — but the “Naturally Flavored” line uses stevia. Good baseline option.
What we love:
- Consistent quality across decades of production
- Available at every retailer, online and in-store
- Naturally Flavored line avoids artificial sweeteners
- Informed Choice certified
Best for: Anyone who wants reliable, accessible quality
Best Plant Protein Powders
Garden of Life Raw Organic Protein
Best Overall Plant · $42 / 28 servings · 22 g protein · 130 cal · USDA Organic
A blend of 13 organic sprouted proteins (pea, brown rice, amaranth, quinoa, and more) with live probiotics and enzymes added. USDA Organic, Non-GMO Project Verified, and Informed Choice certified. The sprouting process improves digestibility and nutrient availability.
What we love:
- 13-protein blend for complete amino acid profile
- Added probiotics (1.5 billion CFU) and digestive enzymes
- USDA Organic + Non-GMO Project Verified
- Sprouted ingredients for better absorption
Best for: Plant-based athletes who want the most complete formula
Orgain Organic Protein
Best Value Plant · $28 / 20 servings · 21 g protein · 150 cal · USDA Organic
Orgain delivers solid nutrition at the best price in the organic plant category. Pea protein, brown rice protein, and chia seed base. Creamy texture for a plant protein — the chocolate fudge flavor is genuinely enjoyable. No artificial anything.
What we love:
- Best price per serving in the organic plant category
- Smooth, creamy texture (not gritty)
- USDA Organic and Non-GMO
- Available at Costco for even better value
Best for: Budget-conscious buyers who want organic plant protein
KOS Organic Plant Protein
Best Tasting Plant · $40 / 28 servings · 20 g protein · 170 cal · USDA Organic
KOS blends pea, flax, quinoa, pumpkin seed, and chia proteins with digestive enzymes and a fruit/vegetable blend. Higher calorie count than competitors (170 cal) but that includes real food ingredients, not fillers. The Chocolate Chip Mint flavor won Healthline’s taste test.
What we love:
- Award-winning flavor — best tasting plant protein we’ve tried
- Added digestive enzymes reduce bloating
- Real food ingredients (coconut milk, cinnamon, monk fruit)
- USDA Organic certified
Best for: Anyone who’s been burned by chalky plant protein before
How to Choose
Whey isolate — highest protein per calorie, fastest absorption, best for post-workout. Choose if you tolerate dairy and want maximum efficiency.
Whey concentrate — slightly more fat and carbs, creamier taste, retains more immunoglobulins. Choose for general daily use and smoothies.
Plant blend — complete amino acids when multiple sources are combined. Choose if you’re dairy-free or prefer plant-based nutrition.
What to avoid on the label: sucralose, acesulfame potassium, artificial colors (Red 40, Yellow 5), carrageenan, maltodextrin, and “proprietary blends” that hide ingredient doses.
For post-workout fueling, pair your protein with the right carbs — our high-protein smoothie recipes give you ready-to-blend combinations.
