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SlimFast High Protein Smoothie Mix Review

Included for completeness as a mass-market reference point. This is a meal replacement shake, not a protein supplement — 11g sugar, soy protein isolate, maltodextrin, sunflower oil. Only 20g protein a

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By Alec & Michael•9 min read
✓ Updated Apr 20262.6/10 Score
SlimFast High Protein Smoothie Mix

SlimFast High Protein Smoothie Mix.

High Protein Smoothie Mix

High Protein Smoothie Mix

★★★★★2.6 / 10

Included for completeness as a mass-market reference point. This is a meal replacement shake, not a protein supplement — 11g sugar, soy protein isolate, maltodextrin, sunflower oil.

Formulation Quality
0
Testing & Transparency
0
$1.00/serving
Detailed Scoring

Evident Ratings

High Protein Smoothie Mix

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

2.6
out of 10
0/10
0/10
7/10
5.6/10
4.6/10
Price per serving: $1.00/serving
Our Findings

What We Found

Our concerns

No third-party testing or certification

Contains gums (Gum Arabic, Cellulose Gel, Xanthan Gum)

Contains natural flavors

Contains soy lecithin

Our Verdict

Included for completeness as a mass-market reference point. This is a meal replacement shake, not a protein supplement — 11g sugar, soy protein isolate, maltodextrin, sunflower oil.

See Best Protein Powder →

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High Protein Smoothie Mix

SlimFast

High Protein Smoothie Mix

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

2.6
Overall
Material Safety
0/10
Trust & Reputation
0/10
Value & Policy
7/10
Features
5.6/10
Firsthand testing
4.6/10
Material & Safety
Third-Party Testing
Not identifiedClaimed
COA Availability
Not availableClaimed
Heavy Metals Testing
Not disclosedClaimed
USDA Organic
NoClaimed
Trust & Reputation
Amazon Rating
4.2Verified
Amino Acid Profile Disclosed
NoClaimed
Red Flags
Contains soy protein isolate (estrogenic concerns). 11g sugar. Maltodextrin. High oleic sunflower oil. Meal replacement, not pure protein. No third-party testing. Weight loss marketing.Verified
Value & Policy
Price
$0.80–$1.20/servingVerified
Price Per Serving
$1.00Verified
Features
Natural Flavors
Contains: Contains natural flavorsClaimed
Gums
Contains: Gum Arabic, Cellulose Gel, Xanthan GumClaimed
Soy Lecithin
Contains: Contains soy protein isolate + likely soy lecithinClaimed
Added Sugar
11gClaimed
Sweetener
Sucralose + Added SugarVerified
Protein Source Category
Animal-BasedVerified
Protein Source
Whey BlendVerified
Made In
USAClaimed
GMP Certified
YesVerified
Manufacturing Location
USAClaimed

Background

Legacy weight loss brand (est. 1977). Now owned by Glanbia. Positions as meal replacement rather than sports nutrition. Declining cultural relevance as consumers move toward higher-protein, lower-sugar options.

Full category comparison

Best Protein Powder →