Spring into New Arrivals! Reset and refresh with the latest products from top brands! Be the first to try the newest protein and more.
7 Day Customer Support
  • Live Chat
  • 1-800-537-9910
USD
R1 Protein Isolate

Rule 1 R1 Protein Isolate

A Product
Industry Leading Protein With Zero Sacrifices in Taste!
  • 25 grams of protein per serving
  • Up to 87% protein purity percentage (PPP)
  • 100% Isolate & Hydrolysate
  • 6g BCAAs and 4g Glutamine
M&S Rewards Logo
Muscle & Strength Rewards

Earn 2 points for every dollar you spend at Muscle & Strength! Spend your points on order discounts, fitness gear and exclusive products.

M&S Promos and Deals Logo
Unbeatable Deals

We run the best deals and discounts on the biggest nutrition and fitness brands!

M&S Delivery Truck
Free Shipping on $99+ Orders*

Spend $99 to get FREE shipping in addition to our unbeatable deals! Plus, 100% money-back guarantee on every product we sell.

*USA Only. Excludes: AK, HI, orders above 25lbs and bulk orders.

Credit Card Logo for Refunds
60 Day Guarantee

Not happy with your purchase? No problem. Simply return it to us within 60 days and we'll replace it, credit your account, or give you a full refund.

Mobile Phone Logo
Contact Us

If you have any questions about products please call us on 1-800-537-9910 or email support@muscleandstrength.com

Deals
Buy 2 for $69.99
Buy 2 for $69.99
Buy 2 Rule 1 R1 Protein Isolate 2lbs for only $69.99! Limited time only.
Buy 1 Get 1 FREE
Buy 1 Get 1 FREE
Buy 1 Rule 1 Protein Isolate 1lb and get 1 absolutely FREE! Limited time only.
LIMITED TIME PRICE CUT
LIMITED TIME PRICE CUT
Buy 1 Rule 1 R1 Protein Isolate 5lbs for only $69.99! Limited time only.
Buying Options
$27.99 27.9900
1lb
14 Servings | $2.00 Per Serving
Buy 1 Get 1 FREE
+
$44.99 44.9900
2lbs
29 Servings | $1.55 Per Serving
Buy 2 for $69.99
+
$46.99 46.9900
2lbs Naturally Flavored
36 Servings | $1.31 Per Serving
Out of Stock
$99.99
$69.99 69.9900
5lbs
76 Servings | $0.92 Per Serving
LIMITED TIME PRICE CUT
+
$99.99 99.9900
5lbs Naturally Flavored
60 Servings | $1.67 Per Serving
Out of Stock
$164.99 164.9900
10lbs
140 Servings | $1.18 Per Serving
+
 
Secure Transaction
Nutrition Info

1lb Chocolate Fudge

Serving Size: 1 Scoop (32g)
Servings Per Container: 14
Amount Per Serving
Amt
%DV
Calories
110
Total Fat
0.5g
1%
Saturated Fat
0g
0%
Trans Fat
0g
Cholesterol
<5mg
2%
Sodium
60mg
3%
Total Carbohydrate
2g
1%
Dietary Fiber
1g
4%
Total Sugars
<1g
Protein
25g
50%
Vitamin D
0mcg
0%
Calcium
120mg
10%
Iron
1mg
6%
Potassium
270mg
6%
* % Daily Value is based on a 2,000 calorie diet. Your daily values may be higher or lower based on your calorie needs.
† Daily Value (DV) not established.
Ingredients
Protein Blend (Whey Protein Isolate, Hydrolyzed Whey Protein Isolate), Cocoa (Processed with Alkali), Natural and Artificial Flavors, Lecithin, Sucralose, Salt, Acesulfame Potassium.
Allergen Warning
Contains: Milk and Soy.

Mix one heaping scoop of R1 Protein™ with approx. 6-8 oz. of water, milk or your favorite beverage in a shaker cup or glass with spoon

KEEP OUT OF REACH OF CHILDREN

Directions
Warnings
Expand Info
Product Information

Man training in gym with 3 bottles products shots of RULE ONE PROTEIN

R1 Protein Isolate

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 with zero sacrifices when it comes to taste.*

Image showing 2 RULE ONE PROTEIN Bottles with different flavors

RULE ONE PROTEINS™ COMMITMENT TO QUALITY

Since day one, Rule 1 Proteins™ has proven that exceptional quality and superior value aren’t mutually exclusive. We develop our own products, source the finest ingredients, and manufacture them in a FDA-inspected, NSF/GMP-compliant, and Informed-Choice certified facility. Streamlining and tightly controlling every phase of the process, from start to finish, enables us to offer premium products without the premium price.

RULE ONE PROTEIN: Manufactured in America, No Banned Substances, Gluten free

Reviews
Overall Rating
4.8 out of 5 stars
Reviews (499)
Verified Buyers (494)
Review Graph
  • 5 star
    91%

  • 4 star
    6%

  • 3 star
    2%

  • 2 star
    0%

  • 1 star
    1%

Top Rated Flavors
  • Vanilla Crème Naturally Flavored (5/5 )
  • Mint Chocolate Chip (5/5 )
  • Lightly Salted Caramel (4.9/5 )
  • Vanilla Creme (4.9/5 )
  • Cafe Mocha (4.9/5 )
  • Chocolate Fudge (4.8/5 )
  • Cookies & Creme (4.8/5 )
  • Vanilla Butter Cake (4.8/5 )
  • Chocolate Peanut Butter (4.8/5 )
  • Strawberry Banana (4.8/5 )
  • Strawberries & Creme (4.7/5 )
  • Frozen Banana (4.7/5 )
  • Red Velvet (4.4/5 )
  • Fruity Cereal (4.1/5 )
  • Show More +
    Show Less -
Overall Rating
  • Cafe Mocha
  • Chocolate Fudge
  • Mint Chocolate Chip
  • Strawberries & Creme
  • Show More +
    Show Less -
User Image
Joseph A
Verified Buyer
Great product and flavors best protein ever highly recommended *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-21 21:48:15Z
Loading
Overall Rating
  • Chocolate Peanut Butter
  • Lightly Salted Caramel
  • Show More +
    Show Less -
User Image
Ryan N
Verified Buyer
Tastes great and mixes really well!! These 2 flavors don’t foam up like some of the others do *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-21 20:30:59Z
Loading
Overall Rating
  • Strawberries & Creme
  • Show More +
    Show Less -
User Image
Damon W
Build Muscle
Verified Buyer
1st time trying this product. Does mix well with milk and or water. Good taste, but I add a banana to my shakes. No bloating feeling or aftertaste either. Would recommend product to anyone looking for a good Isolate Protein. Cost wasn't bad either.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-21 20:04:37Z
Loading
Overall Rating
  • Chocolate Peanut Butter
  • Show More +
    Show Less -
User Image
Gregory S
Build Muscle
Verified Buyer
Absolutely amazing all the way around the bored ,I love it and will recommend it to everybody I come across*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-19 12:11:12Z
Loading
Overall Rating
  • Lightly Salted Caramel
  • Vanilla Butter Cake
  • Show More +
    Show Less -
User Image
John M
Build Muscle
Verified Buyer
Great tasting shakes and mix well in a shaker. Will definitely buy again *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-18 12:22:56Z
Loading
Overall Rating
    Show More +
    Show Less -
User Image
Robert R
Burn Fat
Verified Buyer
Ordered on 5/4/24 haven’t received anything! The worst customer service ever *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-18 12:22:56Z
Loading
Overall Rating
  • Chocolate Fudge
  • Show More +
    Show Less -
User Image
Rishabh D
Build Muscle
Verified Buyer
Got this for the first time. Too soon to comment on the results but the consistency and flavour is quite decent. *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-17 11:59:10Z
Loading
Overall Rating
  • Chocolate Peanut Butter
  • Show More +
    Show Less -
User Image
James E
Build Muscle
Verified Buyer
Great tasting protein powder that mixes easily with either water or milk.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-17 11:59:10Z
Loading
Overall Rating
  • Cookies & Creme
  • Strawberries & Creme
  • Show More +
    Show Less -
User Image
Tim W
Verified Buyer
Clean nutritional profile-great taste-mixes well-decent price thru M&S*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-17 11:32:35Z
Loading
Overall Rating
  • Chocolate Peanut Butter
  • Show More +
    Show Less -
User Image
ZACHARIAH T
Verified Buyer
I love how smooth iso mixes. Anything with peanut butter is my favorite.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-05-15 16:26:05Z
Loading
Loading
* Muscle & Strength does not imply any medical claims from this review. There are no guarantees of specific results and results may vary.
* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Which products should we notify you about?


  • Loading product choices...
Text Message Alert
+1