Optimum Nutrition Coupons, Promo Codes & Discounts 2026
Optimum Nutrition
(5 ratings)
Store policies
Optimum Nutrition owns and operates its own manufacturing facilities to ensure high product quality.
The brand provides detailed information on its high-quality ingredients, including composition and sourcing.
A 60-day satisfaction guarantee is offered for products bought from its official website.
Returns are accepted within 30 days if 75% or more of the product is unused.
Optimum Nutrition
Verified
$3.50 Off Gold Standard Casein at Kroger
On 2 lb tubs of Creamy Vanilla flavor.
View offer on Benny
Expires
9
used in the last hour
Used
51
times
Optimum Nutrition
Verified
$5 Off Gold Standard Whey at Walmart
On 2 lb tubs of Double Rich Chocolate flavor.
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Expires
22
used in the last hour
Used
53
times
Optimum Nutrition
Verified
$5 Off Gold Standard Whey at Costco
On 5 lb tubs of Vanilla Ice Cream flavor.
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Expires
16
used in the last hour
Used
65
times
Optimum Nutrition
Verified
$4.50 Off Serious Mass at Sam's Club
On 12 lb bags of Vanilla flavor.
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Expires
17
used in the last hour
Used
71
times
Optimum Nutrition
Verified
$3.50 Off Gold Standard Casein at Publix
On 4 lb tubs of Chocolate Supreme flavor.
View offer on Benny
Expires
20
used in the last hour
Used
74
times
Optimum Nutrition
Verified
$3 Off Gold Standard Isolate at Meijer
On 1.6 lb tubs of Chocolate Bliss flavor.
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Expires
19
used in the last hour
Used
79
times
Optimum Nutrition
Verified
$4.50 Off Serious Mass at Target
On 6 lb bags of Chocolate Peanut Butter flavor.
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Expires
24
used in the last hour
Used
87
times
Optimum Nutrition
Verified
$4 Off Gold Standard Plant Protein at Albertsons
On 2 lb tubs of Vanilla flavor.
View offer on Benny
Expires
10
used in the last hour
Used
88
times
Optimum Nutrition
Verified
$5 Off Gold Standard Whey at BJ's
On 10 lb bags of Extreme Milk Chocolate flavor.
View offer on Benny
Expires
26
used in the last hour
Used
90
times
Optimum Nutrition
Verified
$4 Off Gold Standard Plant Protein at Safeway
On 1.5 lb tubs of Chocolate flavor.
View offer on Benny
Expires
19
used in the last hour
Used
99
times
How It Works
STEP 1
Download Benny
Download the Benny app on iOS or Android. It’s free and just takes a minute.
STEP 2
Scan Your Receipt
Snap a photo of your receipt after shopping. Benny identifies eligible purchases matching the coupon.
STEP 3
Get Paid
Get cash back with the amount of the coupon directly to your Benny account in the same day.
Download Benny
Muscle Milk
Verified
$3 Off Muscle Milk Pro Series Protein Powder at Sam's Club
On Muscle Milk Pro Series Protein Powder.
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Oatly
Verified
$3 Off Oatly Frozen Dessert at Publix
On Oatly Frozen Dessert.
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Horizon Milk
Verified
$1.50 Off Horizon Organic Whole Milk at Walmart
On Horizon Organic Whole Milk.
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Fairlife Milk
Verified
$3 Off Fairlife Chocolate 2% Ultra-Filtered Milk 14oz at Meijer
On Fairlife Chocolate 2% Ultra-Filtered Milk 14oz bottles.
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Muscle Milk
Verified
$2.50 Off Muscle Milk Gainer Protein Powder at Meijer
On Muscle Milk Gainer Protein Powder.
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Fairlife Milk
Verified
$3 Off Fairlife Chocolate 2% Ultra-Filtered Milk at Target
On Fairlife Chocolate 2% Ultra-Filtered Milk bottles.
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Frequently Asked Questions
