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Whey Isolate/Hydrolysate

(59 reviews) Write a Review
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Whey Isolate/Hydrolysate Formula

Our flagship protein is made with super-pure 100% whey isolate, fast-acting whey hydrolysate, and virtually nothing else. We’ve completely omitted the use of whey concentrates as well as creamers, gums, amino spiking, and other fillers that dilute what you really came for – protein. The result is an industry leading Protein Purity Percentage (PPP) of up to 87%. ^ R1 Protein is protein with a capital-P.

  • ZERO sugar
  • ZERO fat
  • ZERO gluten
  • ZERO gums
  • ZERO creamers
  • ZERO fillers
  • ZERO artificial preservatives
  • ZERO amino or banned substance spiking


Whey Isolate/Hydrolysate Formula

  • 25 g fast-acting protein*
  • 100% of protein from whey isolates & hydrolysates – no whey concentrates!
  • 6+ g BCAAs*
  • Fully instantized to mix easily with a spoon or shaker cup
  • Carefully blended and packaged in an NSF GMP facility in the USA

^PPP varies by flavor and is calculated as protein per serving (g) / serving size (g) x 100. * Per serving. * Amino acids are naturally occurring and approximated.


Add one (1) scoop of R1 Protein powder to one (1) cup *8oz) of cold water. Stir or blend until smooth

Allergen Information

contains Milk, Soy and Wheat.

Chocolate Fudge
Orange Dreamsicle
Cookies and Creme
Lightly Salted Caramel
Red Velvet
Strawberry Nutrition
Vanilla Butter Cake
Vanilla Creme
When are the best times to use R1 Protein?
R1 Protein is a fast acting protein and works well first thing in the morning and before or immediately after workouts to help effectively deliver the vital amino acids your muscles need for optimal performance.
How much R1 Protein should I take?
It really depends upon factors such as your physical size, what your diet consists of, how many total calories you consume, and your activity level. A common rule of thumb in the bodybuilding world is to aim for 1 gram of protein per pound of bodyweight per day. In other words, a 200 lb athlete should target 200 g of total protein from all dietary sources including protein powders and other supplements.
What are the main differences between R1 Protein and R1 Whey Blend?
R1 Protein is our flagship protein made exclusively with pure, fast-acting whey protein isolates and whey protein hydrolysates. R1 Protein contains no fillers, creamers, or gums and provides little to no fat, cholesterol, carbohydrate, or sugars. When it comes to protein powders, they don't get much cleaner than this. R1 Whey Blend is also 100% whey protein, but contains a blend of whey protein concentrates, isolates and hydrolysates. The whey protein concentrates contain less protein and greater amounts of fat and carbs than isolates, but they are more cost effective. Whey protein concentrates also contribute to a richer flavor and creamier texture, making R1 Whey Blend is a great choice for athletes who prioritize taste when choosing a protein powder.

59 Reviews

  • 5

    Rule 1 Protein

    Posted by Jason on Feb 14th 2018

    Best tasting and mixes smoothly. Highly recommend all Rule 1 Proteins

  • 5

    So far loving it

    Posted by Jaime on Feb 9th 2018

    Switched from using ON products which is still really great but this just looked a little bit better and cleaner ingredients, I'm a hard gainer so I'm looking for anything extra to help out. Great flavor, easy mixing, and loving the results. I purchased during a 20% off sale, it's expensive without any sales so I'm not sure if I'll keep using it if I have to pay full price

  • 5

    R1 Protein

    Posted by Dennis F on Feb 9th 2018

    Awesome product, the Vanilla Creme tastes awesome and is just the right consistency. No clumps. Just pure delightful protein

  • 5


    Posted by Jack Mehoff on Feb 8th 2018

    Helped created explosive Gains! love it. taste great.

  • 5

    Rule 1 Protein

    Posted by Gary Campbell on Jan 31st 2018

    I have tried others, but Rule 1 is my favorite. I feel I have more energy and my blood sugar doesn't go all wonkie.

  • 5


    Posted by Erica Roberg on Jan 26th 2018

    Absolutely love this product!! Tastes great and keeps me full in the mornings! Mixes well with just water

  • 5

    Cleanest + Cheapest + Best Tasting

    Posted by Alejandro Ladines on Jan 24th 2018

    I'm never buying any other brand other than R1.

  • 5

    By far my favorite protein

    Posted by Bailey on Jan 24th 2018

    I’ve had several of the flavors, apple cinnamon being the most recent, and i absolutely love all of them. This is the only protein that I’ve found so far that is simple and effective. I’m also extremely lactose intolerant and this is the only brand of protein I’ve been able to handle with absolutely no side effects!

  • 5

    Chocolate Fudge R1 Protein

    Posted by Kelly Daniels on Jan 23rd 2018

    I absolutely love this flavor and love the impact it has on my body post work out. I strongly recommend this product.