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Rule One R1 Protein Whey Isolate Review

Clean macro profile (110 cal, 25g protein, 0.5g fat, 2g carb) from 100% isolate sources (WPI + hydrolyzed WPI). Informed Choice certified. Own manufacturing facility. No gums. A 'Naturally Flavored' v

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By Alec & Michael•9 min read
✓ Updated Apr 20264.5/10 Score
Rule One R1 Protein Whey Isolate

Rule One R1 Protein Whey Isolate.

R1 Protein Whey Isolate

R1 Protein Whey Isolate

★★★★★4.5 / 10

Clean macro profile (110 cal, 25g protein, 0.5g fat, 2g carb) from 100% isolate sources (WPI + hydrolyzed WPI).

Formulation Quality
3.5
Testing & Transparency
3.5
$1.25/serving
Detailed Scoring

Evident Ratings

R1 Protein Whey Isolate

Sub-scores are category scores on a 1–5 scale, shown out of 10.

4.5
out of 10
3.6/10
3.6/10
6/10
6/10
4.6/10
Price per serving: $1.25/serving
Our Findings

What We Found

What we liked

Third-party tested (Informed Choice)

No gums or thickeners

No added sugar

25g protein per serving

Our concerns

Contains natural flavors

Uses artificial sweeteners

No independent heavy metals testing data

Our Verdict

Clean macro profile (110 cal, 25g protein, 0.5g fat, 2g carb) from 100% isolate sources (WPI + hydrolyzed WPI).

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R1 Protein Whey Isolate

Rule One

R1 Protein Whey Isolate

Researched and scored by Evident Reviews using our published criteria (owned brands disclosed)Medium confidence

4.5
Overall
Material Safety
3.6/10
Trust & Reputation
3.6/10
Value & Policy
6/10
Features
6/10
Firsthand testing
4.6/10
Material & Safety
Third-Party Testing
Informed ChoiceVerified
Heavy Metals Testing
No independent heavy metals data foundClaimed
USDA Organic
NoClaimed
Trust & Reputation
Amazon Rating
4.4Verified
Amino Acid Profile Disclosed
YesVerified
Red Flags
Two artificial sweeteners. Lecithin type unspecified (may be soy). Artificial flavors. No heavy metals data.Verified
Value & Policy
Price
$1.10–$1.40/servingVerified
Price Per Serving
$1.25Verified
Features
Natural Flavors
Contains: Contains 'Natural and Artificial Flavors'Claimed
Gums
NoneVerified
Added Sugar
NoneVerified
Sweetener
Sucralose + Acesulfame-KVerified
Protein Source Category
Animal-BasedVerified
Protein Source
Whey IsolateVerified
Made In
USAClaimed
GMP Certified
YesVerified
Manufacturing Location
USAClaimed

Background

Founded with the philosophy that Rule 1 is 'never compromise quality.' Manufactured in their own facility (not contract manufactured). Known for clean macros and good mixability. Growing brand but lower awareness than majors.

Full category comparison

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