Top 10 Best weight gainer in 2026

Last Updated - 6/28/2026

🏆Best Choice

RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer (Bag) Chocolate Fudge 12 lbs

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

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$73.75

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RIVAL NUTRITION

Rival Nutrition Clean Gainer- Chocolate Fudge, 5lbs.

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

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$34.45

$38.11

-10%

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Rule 1 Proteins

Rule 1 Clean Gainer - High-Protein Lean Gain Formula with 560 Calories, 30g of Full-Spectrum Protein, Over 90g Carbs, Under 6g of Fat (15 Servings, Chocolate Fudge)

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Rule One Protein's Lean Gainer Formula: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add incremental size and strength.
•Quality Carbs: Over 90g of readily digested simple and complex carbs from multiple sources to help training energy and post-workout glycogen recovery.
•Full-Spectrum Protein: 30g of protein from whey, milk isolate, and micellar casein supply vital amino acids.
•Amino Packed: Loaded with naturally-occurring essential amino acids (EAAs), branched-chain amino acids (BCAAs), and other important amino acids for muscle repair and recovery.
•Clean Manufacturing: Clean Gainer is proudly made in our own state-of-the-art GMP-certified facilities in the USA (with globally sourced ingredients) and is banned substance tested by Informed Choice.
•A Wide Variety of Sizes and Flavors: R1 Clean Gainer is produced in 5 and 10-pound sizes and 4 fan-favorite flavors.
•Directions: Mix two (2) scoops of R1 Clean Gainer with approx. 14-16 oz. of water, milk, or your favorite beverage in a shaker cup for a delicious shake. Or add your favorite fruit and ice to the above, mix in a blender, and enjoy as a smoothie!

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$34.99

$39.99

-13%

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RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer - Creamy Vanilla 10 lbs

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

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$65.00

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RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer - Chocolate Peanut Butter 10lb

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

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$65.00

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RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer- Chocolate Fudge, 10lbs.

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sport: Tested and monitored for over 250 banned substances by LGC - an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.
•Quality Made: In our own state-of-the-art, U.S.-based, cGMP facility from the finest, globally-sourced ingredients.
•Easy to Use: Stir, Shake, or Blend 2 heaping scoops of Clean Gainer with 12-14 oz. of water or milk until powder is dissolved. Tip: Try blending in energy-dense ingredients like nut butters or vegetable oils for even greater mass potential.
•Allergen Information: Contains Milk and Soy

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$71.19

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RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer - Soft Serve Vanilla

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

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$38.68

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RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer - Campfire S'Mores 10lb

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

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$65.00

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RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer - Cookies & Cream 10lb

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

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$65.00

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RIVAL NUTRITION

RIVAL NUTRITION Clean Gainer - Cinnamon Toast Cereal 10lb

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Lean Gains: 560 quality calories from premium proteins, fast-fueling carbohydrates, and energy-packed lipids to help you add size and strength.
•Full-Spectrum Proteins: 30g of protein from Whey, Milk Isolate, and Micellar Casein provides 9 essential amino acids to assist with muscle repair and rebuilding.
•Multi-Source Carbohydrates: Readily digested simple and complex carbs help fuel training energy and post-workout glycogen recovery.
•Safe for Sports: Tested and monitored for over 250 banned substances by LGC- an accredited, independent, anti-doping laboratory.
•Great Tasting Flavors: Including Chocolate Fudge, Soft Serve Vanilla, Cookies & Cream, Chocolate Peanut Butter, Cinnamon Toast Cereal, and S'mores.

View offer on:

$65.00

Check Price

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Our team evaluates this data alongside genuine user feedback, merging AI analysis with human insights to provide you with real-time, highly-rated recommendations that empower your decision-making with clarity and confidence.