Prices updated recently · 249 products tracked across 50 brands
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Best Protein Powder Deals at Costco

Costco doesn't carry many protein SKUs: but the ones it does carry are usually the cheapest per gram of protein in the country. Bulk 6lb tubs of Optimum Nutrition and Premier, kettle-cost pricing on Kirkland Signature whey. Below: every product where Costco is currently the cheapest of all 12 retailers we track.

25
Products cheapest at Costco
9.8%
Average savings vs other retailers
76
Best Value Score from Costco

Products Cheapest at Costco

25 products
Premier Protein 30g Protein Shake (12-Pack)
76Score
#1 Value
Premier Protein
30g Protein Shake (12-Pack): Vanilla 8.6lb
$29.99at Costco
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Premier Protein 30g Protein Shake (12-Pack)
75Score
Premier Protein
30g Protein Shake (12-Pack): Chocolate 8.6lb
$29.99at Costco
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Premier Protein 30g Protein Shake (12-Pack)
74Score
Premier Protein
30g Protein Shake (12-Pack): Strawberries & Cream 8.6lb
$30.49at Costco
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Premier Protein 30g Protein Shake (12-Pack)
74Score
Premier Protein
30g Protein Shake (12-Pack): Cafe Latte 8.6lb
$30.49at Costco
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Premier Protein 30g Protein Shake (12-Pack)
73Score
Premier Protein
30g Protein Shake (12-Pack): Cookies & Cream 8.6lb
$30.99at Costco
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Premier Protein 30g Protein Shake (12-Pack)
73Score
Premier Protein
30g Protein Shake (12-Pack): Bananas & Cream 8.6lb
$30.99at Costco
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Premier Protein 30g Protein Shake (12-Pack)
73Score
Premier Protein
30g Protein Shake (12-Pack): Cookie Dough 8.6lb
$30.99at Costco
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Premier Protein 30g Protein Shake (12-Pack)
72Score
Premier Protein
30g Protein Shake (12-Pack): Caramel 8.6lb
$31.49at Costco
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Fairlife Core Power Core Power Elite 42g Protein Shake (12-Pack)
65Score
Fairlife Core Power
Core Power Elite 42g Protein Shake (12-Pack): Chocolate 10.98lb
$42.99at Costco
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Fairlife Core Power Core Power Elite 42g Protein Shake (12-Pack)
64Score
Fairlife Core Power
Core Power Elite 42g Protein Shake (12-Pack): Strawberry Banana 10.98lb
$42.99at Costco
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Now Sports Whey Protein Concentrate
63Score
Now Sports
Whey Protein Concentrate: Creamy Vanilla 5lb
$31.99at Costco
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Fairlife Core Power Core Power Elite 42g Protein Shake (12-Pack)
63Score
Fairlife Core Power
Core Power Elite 42g Protein Shake (12-Pack): Vanilla 10.98lb
$43.49at Costco
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Fairlife Core Power Core Power 26g Protein Shake (12-Pack)
59Score
Fairlife Core Power
Core Power 26g Protein Shake (12-Pack): Vanilla 10.98lb
$34.99at Costco
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Fairlife Core Power Core Power 26g Protein Shake (12-Pack)
58Score
Fairlife Core Power
Core Power 26g Protein Shake (12-Pack): Chocolate 10.98lb
$34.99at Costco
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Fairlife Core Power Core Power 26g Protein Shake (12-Pack)
57Score
Fairlife Core Power
Core Power 26g Protein Shake (12-Pack): Strawberry Banana 10.98lb
$35.49at Costco
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Fairlife Core Power Core Power 26g Protein Shake (12-Pack)
56Score
Fairlife Core Power
Core Power 26g Protein Shake (12-Pack): Chocolate Peanut Butter 10.98lb
$35.99at Costco
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Fairlife Core Power Core Power 26g Protein Shake (12-Pack)
56Score
Fairlife Core Power
Core Power 26g Protein Shake (12-Pack): Banana 10.98lb
$35.99at Costco
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Optimum Nutrition Gold Standard 100% Whey
46Score
Optimum Nutrition
Gold Standard 100% Whey: Double Rich Chocolate 10lb
$89.99at Costco
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Sports Research Whey Protein Isolate
39Score
Sports Research
Whey Protein Isolate: Vanilla Bean 2lb
$36.99at Costco
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Sports Research Whey Protein Isolate
38Score
Sports Research
Whey Protein Isolate: Dutch Chocolate 2lb
$37.99at Costco
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Isopure Zero Carb Whey Isolate
33Score
Isopure
Zero Carb Whey Isolate: Creamy Vanilla 7.5lb
$89.99at Costco
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Orgain Organic Plant-Based Protein
25Score
Orgain
Organic Plant-Based Protein: Creamy Chocolate Fudge 2.03lb
$24.99at Costco
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Sports Research Collagen Peptides
22Score
Sports Research
Collagen Peptides: Unflavored 1lb
$29.99at Costco
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KOS Organic Plant Protein
16Score
KOS
Organic Plant Protein: Chocolate 2.6lb
$39.99at Costco
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Vital Proteins Collagen Peptides
15Score
Vital Proteins
Collagen Peptides: Unflavored 1.25lb
$39.99at Costco
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Why Shop Protein at Costco?

$/g

Lowest cost-per-gram of protein

Costco's bulk-pack pricing is built around volume, not margin: on the SKUs it stocks, Costco regularly beats every other US retailer on $/gram of protein.

CO

Curated, no-junk catalog

Costco only carries protein SKUs that have already proven themselves at scale: Optimum Gold Standard, Premier, Vital Proteins, Kirkland Signature. No fly-by-night brands.

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Members-only pricing

Pricing is locked to active Gold Star or Executive members. Executive members also earn 2% back on the year, which effectively drops protein prices another 2%.

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How we use Costco prices

We do not have an affiliate relationship with Costco. We track their prices because they're a meaningful US benchmark and frequently the cheapest. Outbound "View Deal" links on this page earn us nothing: they exist to send you to the best price. Read our full methodology.

Member-only pricing with free 2-day shipping over $75. Costco membership ($65/year) required. No affiliate relationship: we track Costco for bulk-buy comparisons.

Want to see every retailer compared?

Costco isn't always the cheapest. See how all 12 US retailers stack up.

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