Kirkland Signature Protein Shakes

Latest three-month snapshot through 2026-08-17 · 3 waves. Use the controls above to change the window.

Protein Shakes (RTD) · 3 waves · n=216 answers, pooled

By model

How often each model brings the brand up in recommendation answers.

Share of recommendations over time

Wave-by-wave share of recommendation answers that named this brand.

What they call it

Recurring descriptions in the models' own words, grouped by theme.

• budget-friendly ×6

  “Warehouse Club Private Labels (The Best Value)”

• 30g protein ×5

  “* **The Macros:** 30g protein, 160 calories, 1g sugar, 24 vitamins and minerals.”

• 1 g sugar ×3

  “* **The Macros:** 30g protein, 160 calories, 1g sugar, 24 vitamins and minerals.”

• 120 calories per serving ×2

  “Because Premier Protein's signature profile is **30g of protein, 160 calories, and 1g of sugar**, the best alternatives match these exact macros at a lower price point.”

• absolute cheapest ×2

  “* **The Price:** Extremely budget-friendly.”

• direct competitor ×2

  “* **The Verdict:** Launched as a direct competitor to Premier and Fairlife, these milk-protein-based shakes are rich, creamy, and have earned highly positive reviews for lacking a strong artificial aftertaste.”

• milk protein ×2

  “Formulated with milk protein, it has a smooth, chocolate-milk-like texture similar to Fairlife but at a fraction of the price.”

• $20 to 35 percent lower prices ×1

  “* **Price:** Unbeatable bulk pricing, coming out to roughly **$1.”

• $40–$60 range ×1

  “If you have a Costco or Sam’s Club membership, their private-label shakes offer the absolute best price-to-protein ratio on the market:”

• $5-10 less ×1

  “It is a massive money-saver if you regularly go through a lot of shakes.”

In their words

17 exact quoted mentions in this snapshot, grouped by coded tone. Recent quotes are deduplicated and mixed across models.

What they recommend

“they work out to roughly **$1.20 per shake**. **The Verdict:** Launched as a direct competitor to Premier and Fairlife, these milk-protein-based shakes are rich, creamy, and have earned highly positive reviews for lacking a strong artificia”

“If you have a Costco membership, their store-brand RTD shake is one of the cheapest options available anywhere.”

“they average roughly $1.20 to $1.60 per carton”

“It has the exact same macros as Premier Protein (30g protein, 160 calories, 1g sugar) but is sold in bulk 18-packs. It works out to an incredibly cheap **~$1.20 USD per shake**”

“Costco has introduced its own Kirkland ready-to-drink shakes. They feature 30g of milk protein, 160 calories, and 1g of sugar.”

Where they hedge

“Highly rated for flavor and a direct competitor to high-end brands like Fairlife, though clean-eating advocates note that it uses canola oil as a thickener (a common practice, though some prefer Premier's use of sunflower oil).”

The substitution map

Which competitors models suggest when shoppers ask for something cheaper.

Where this comes from

10 of 17 mentions appear alongside an identifiable web citation. Citation does not establish causation.

Where they send you

Stores and sites models name as places to buy this brand.

Method: fixed shopper questions asked repeatedly to Claude, OpenAI GPT and Gemini with web search on. Shares are the percentage of recommendation answers mentioning the brand. Quotes are AI outputs; full transcripts are kept as receipts.