Best Mass Gainers Brands

Last updated:

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

10
Brands
74
Avg Score
0
NSF/USP Certified
8
No Testing

Top 3 most trusted mass gainers

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#1
Optimum Nutrition 100/100 A+
Informed Sport GMP

✓ Informed Sport certified — every batch tested

Buy on Amazon Buy on Herbspro Buy on Musclesupplements EU Buy on iHerb
#2
REDCON1 95/100 A+
Informed Sport GMP

✓ Informed Sport certified — every batch tested

Buy on Amazon Buy on Herbspro Buy on Musclesupplements EU Buy on iHerb
#3
Universal Nutrition 70/100 B+
GMP

✓ Established brand — operating since 1977 (49 years)

Buy on Amazon Buy on Herbspro Buy on Musclesupplements EU Buy on iHerb

All Mass Gainers Brands

100
Grade: A+

Optimum Nutrition

Informed SportGMP
95
Grade: A+

REDCON1

Informed SportGMP
70
Grade: B+

Universal Nutrition

GMP

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

MHP (Maximum Human Performance)

GMP

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

Ronnie Coleman Signature Series

GMP

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

Rich Piana 5% Nutrition

GMP

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

Mutant

GMP

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

Scitec Nutrition

GMP

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

MuscleTech

GMP

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

BSN

GMP

⚠ No third-party testing certifications found

Free: The Trusted Supplement Shortlist

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