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Rule One Proteins R1 Protein Whey Isolate - 25g Protein from 100% Whey Protein Isolate - Birthday Cake - 2lb - 2 of 3Rule One Proteins R1 Protein Whey Isolate - 25g Protein from 100% Whey Protein Isolate - Birthday Cake - 2lb - 3 of 3
Rule One Proteins R1 Protein Whey Isolate - 25g Protein from 100% Whey Protein Isolate - Birthday Cake - 2lb - 1 of 3

Rule One Proteins R1 Protein Whey Isolate - 25g Protein from 100% Whey Protein Isolate - Birthday Cake - 2lb

$54.99

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About this item

Highlights

  • Our Flagship Protein Powder: With 100% of the protein from derived from whey isolate sources, the pinnacle of our protein lineup is pure, fast-acting, and available in a variety of great tasting flavors.
  • Protein & Amino Packed: Provides 25g of protein and 6g of naturally occurring branched chain amino acids (BCAA) per serving for daily fortification and recovery after workouts.
  • Ultra-Clean Macros: R1 Protein Whey Isolate contains no whey concentrates, added sugars, gums, creamers, gluten, or amino spiking. It's also virtually lactose & cholesterol free.
  • Anytime Formula: R1 Protein Whey Isolate works well first thing in the morning, before or after workouts, between meals as a snack, or anytime for a high protein treat.
  • Clean Manufacturing: Proudly made in the USA in our own state-of-the-art facility with the finest globally sourced ingredients. As an Informed Choice certified product, R1 Protein Whey Isolate is also independently tested for banned substances.
  • Easy to Use: Add one scoop of R1 Protein Whey Isolate to 6-8 fluid ounces of cold water, milk, or your favorite beverage. Stir, shake, or blend for about 30 seconds, until smooth.
  • Approximate Sizing: *Weights are rounded to the nearest pound. Product servings per container vary slightly between flavors.

Description

Our flagship protein is made with super-pure whey isolate, fast-acting partially hydrolyzed whey isolate, and aside from flavor components, virtually nothing else. We've completely omitted the use of whey protein concentrates, creamers, amino spiking, and other unnecessary ingredients that dilute what you really came for - protein. The result is an industry-leading 100% whey isolate with zero sacrifices when it comes to taste.
Protein Grams per Serving: 25 g
Product Warning: Adult Use Only
Product Form: Powder
Primary dietary ingredient: Whey Protein Isolate
Protein type: Whey Protein Isolate
Package Quantity: 1
Primary dietary ingredient amount per serving: 25 mg
TCIN: 1010652162
UPC: 196671005236
Origin: Made In USA
Healthcare Disclaimer:
Content on this site is for reference purposes only. Target does not represent or warrant that the nutrition, ingredient, allergen and other product information on our Web or Mobile sites are accurate or complete, since this information comes from the product manufacturers. On occasion, manufacturers may improve or change their product formulas and update their labels. We recommend that you do not rely solely on the information presented on our Web or Mobile sites and that you review the product's label or contact the manufacturer directly if you have specific product concerns or questions. If you have specific healthcare concerns or questions about the products displayed, please contact your licensed healthcare professional for advice or answers.
The above item details were provided by the Target Plus™ Partner. Target does not represent or warrant that this information is accurate or complete. On occasion, manufacturers may modify their items and update their labels.
We recommend that you do not rely solely on the information presented. If you have a specific question about this item, you may consult the item's label, contact the manufacturer directly or call Target Guest Services at 1-800-591-3869.
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Serving Size: 31 g

Serving Per Container: 29

Amount :

Calories: 110
% Daily Value*
Total Fat 0g0%
Saturated Fat 0g0%
Trans Fat 0g
Cholesterol 0mg0%
Sodium 150mg7%
Total Carbohydrate 2g1%
Dietary Fiber 0g0%
Sugars 0g
Added Sugars 0g0%
Protein 25g50%
Vitamin D 0mcg0%
Calcium 120mg10%
Iron 0mg0%
Potassium 170mg4%
* Percentage of Daily Values are based on a 2,000 calorie diet.

Ingredients:

protein blend (whey protein isolate, hydrolyzed whey protein isolate), natural and artificial flavors, contains 2% or less of salt, sucralose, acesulfame potassium, blue spirulina (color), soy lecithin, sunflower lecithin.

Allergens & Warnings:

Notice: Use this product as a food supplement only. Do not use for weight reduction., Product intended for healthy active adults. Keep out of reach of children., Contains: Milk & Soy.

Shipping details

Estimated ship dimensions: 6 inches length x 6 inches width x 10 inches height
Estimated ship weight: 2 pounds
This item cannot be shipped to the following locations: American Samoa (see also separate entry under AS), Guam (see also separate entry under GU), Northern Mariana Islands, Puerto Rico (see also separate entry under PR), United States Minor Outlying Islands, Virgin Islands, U.S., APO/FPO, Alaska, Hawaii
item ships from third party seller: Rule One Proteins

Return details

This item cannot be returned; please reference our return policy for more information.
See the return policy for complete information.

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Flavor is second to none, very clean high quality ingredients, digests great may depend on your digestive system but very clean. Very enjoyable taste like a dessert.
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Love this Protein!

I live the R1 Fruity Cereal Flavor Protein! It tastes amazing, Blends well, and digests well.
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I’m a fan of this protein and it tastes good and also is good quality and MANY flavors.
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Love it!

I love the taste of the pistachio flavor! Filling and easy on the stomach.
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Bought 4 5lbs.

BEEN IN THE GAME FOR A COUPLE DECADES. IF YOU RESPECT YOURSELF AND TRULY INTO YOUR GAINS, THIS IS THE ONLY PROTEIN TO CONSUME.
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5 out of 5 stars
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Delicious

[This review was collected as part of a promotion.] Flavor and ability to mix are great! Their protein hits the mark.
Adam B.
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5 out of 5 stars
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Delicious

Flavor and ability to mix are great! Their protein hits the mark.
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5 out of 5 stars
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Pistachio R1

[This review was collected as part of a promotion.] The best protein flavor i’ve ever tried, like a treat anytime i drink it. my favorite flavor
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Whey Isolate Vanilla Cream!

[This review was collected as part of a promotion.] Amazing flavor! Mixes really well too! Definitely buying again!
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Whey Isolate Vanilla Cream!

Amazing flavor! Mixes really well too! Definitely buying again!
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5 out of 5 stars
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Hands down

[This review was collected as part of a promotion.] The best protein on the market !!! No question at all. Taste and quality is the best I have had . I have been training and drinking protein shakes since 2000. Rule 1 is absolutely the best !
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Bought 3

Flavor is always great protein mixes better than any other and isn’t all thick like all the other proteins from other companies.
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Rule 1 Whey protein

[This review was collected as part of a promotion.] Tried for the first time and I like it! easy to mix and flavor is spot on with no aftertaste! Recommend!
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28 April, 2026
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Everything about it is great

[This review was collected as part of a promotion.] Everything about it , the flavor the taste and the quality is top notch!
Brian D.
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The best whey protein isolate I've ever had.

[This review was collected as part of a promotion.] The flavor tastes amazing. I grabbed pistachio and it's on point. It's not bitter.. It's smooth. The quality was done well. It's not tough to drink down like some brands out there. Definitely getting it again.
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Whey Isolate Protein

[This review was collected as part of a promotion.] Great flavor and easy mixing! No bad aftertaste! Recommend!
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Staple in our routine

[This review was collected as part of a promotion.] We’ve gone through several jugs of R1 Protein Whey Isolate in different flavors—Pistachio, Strawberries & Cream, and Caffè Mocha—and it’s become a daily staple in our routine. Whether we’re blending it into shakes or mixing it into homemade protein balls, it consistently delivers both in taste and performance. One of the standout qualities is how smooth and easy it mixes. No clumping, no gritty texture—just a clean, drinkable shake every time. The flavors are surprisingly well done, too. The Pistachio has a subtle, nutty sweetness that isn’t overpowering, the Strawberries & Cream tastes fresh and slightly indulgent without being overly sugary, and the Caffè Mocha is perfect when you want a hint of coffee flavor in your protein. Nutritionally, it checks all the boxes we look for in a whey isolate—high protein content, low carbs, and easy on digestion! It’s been a great fit whether we’re using it post-workout or just trying to hit our daily protein goals. Overall, this is a product we keep coming back to and plan to continue using. If you’re looking for a reliable, great-tasting whey isolate that mixes well and fits easily into different uses, this is definitely one to try. Highly recommend.
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5 out of 5 stars
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Best I have used

[This review was collected as part of a promotion.] This is easily the best mixing protein I have used. Simply mix with water and you get a high protein, low calorie drink that tastes good. I have recommended to all my family and friends.
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My New Favorite Protein

[This review was collected as part of a promotion.] My trainer got this for me as a gift and I am super happy with it. It is super easy to take down and drink. It feels a lot thinner. She got me the pistachio ice cream flavor which I was skeptical about at first, but I was very surprised at how good the flavor was. But I will say is there is I am definitely experiencing a little flavor fatigue and because of that I’m going to buy a couple of different flavors so I could switch it up every day. Definitely might go to moving forward.
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Our go to

[This review was collected as part of a promotion.] This person is my husbands and I go to person. It is the best we have found with it’s smoothness and no clumping.
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