Best Mass Gainers Brands

10 brands ranked by trust score based on certifications, FDA record, and transparency.

10
Brands
75
Avg Score
0
NSF/USP Certified
8
No Testing

Top 3 Most Trusted

#1
Optimum Nutrition
Score: 100/100 (A+)

✓ Informed Sport certified — every batch tested
#2
REDCON1
Score: 100/100 (A+)

✓ Informed Sport certified — every batch tested
#3
Mutant
Score: 70/100 (B+)

✓ Established brand — operating since 2006 (20 years)

All Mass Gainers Brands

100
Grade: A+

Optimum Nutrition

Informed SportGMP
100
Grade: A+

REDCON1

Informed SportGMP
70
Grade: B+

Mutant

GMP

⚠ No third-party testing certifications found
70
Grade: B+

MHP (Maximum Human Performance)

GMP

⚠ No third-party testing certifications found
70
Grade: B+

Scitec Nutrition

GMP

⚠ No third-party testing certifications found
70
Grade: B+

Rich Piana 5% Nutrition

GMP

⚠ No third-party testing certifications found
70
Grade: B+

BSN

GMP

⚠ No third-party testing certifications found
70
Grade: B+

Ronnie Coleman Signature Series

GMP

⚠ No third-party testing certifications found
70
Grade: B+

Universal Nutrition

GMP

⚠ No third-party testing certifications found
60
Grade: B

MuscleTech

GMP

⚠ No third-party testing certifications found