Spring into Savings Sale! Over 50% off top protein, pre-workout, creatine, and more! Free Nutrex Lipo-6 Black UC Powder with orders over $99! While supplies last!
7 Day Customer Support
  • Live Chat
  • 1-800-537-9910
USD
R1 Casein

Rule 1 R1 Casein

A Product
Slow Digesting, Prolonged Delivery Micellar Casein!
  • 25 grams of protein per serving
  • Zero concentrates, sugars and creamers
  • 100% micellar casein
  • 5g BCAAs, slow digesting
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
LIMITED TIME PRICE CUT
LIMITED TIME PRICE CUT
Buy 1 Rule 1 R1 Casein 4lbs for only $39.99! Limited time only.
Buying Options
$39.99 39.9900
2lbs
26 Servings | $1.54 Per Serving
+
$58.99
$39.99 39.9900
4lbs
52 Servings | $0.77 Per Serving
LIMITED TIME PRICE CUT
+
 
Secure Transaction
Nutrition Info

2lbs Chocolate Fudge

Serving Size: 1 Scoop
Servings Per Container: 26
Amount Per Serving
Amt
%DV
Calories
120
Total Fat
1g
1%
Saturated Fat
0.5g
3%
Trans Fat
0g
Cholesterol
15mg
5%
Sodium
260mg
11%
Total Carbohydrate
3g
1%
Dietary Fiber
1g
4%
Total Sugars
<1g
Protein
25g
50%
Vitamin D
0mcg
0%
Calcium
630mg
50%
Iron
1mg
6%
Potassium
260mg
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
Micellar Casein, Cocoa (Processed with Alkali), Natural and Artificial Flavors, Salt, Sunflower Lecithin, Cellulose Gum, Xanthan Gum, Sucralose, Acesulfame Potassium.
Allergen Warning
Contains: Milk.

Mix one heaping scoop of R1 Casein™ with approx. 10-12 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

Shirtless Muscular Man Training in gym with 2 bottles shots of RULE 1 CASEIN with features

R1 Casein

Even in our fast-paced world, there are times when it pays to slow down. Take between meals and bedtime for example. During these occasions you want a protein that takes its time. Something to hold you over until your next meal. A protein that breaks down more slowly, delivering its amino acids over several hours. R1 Casein is what you’re after.*

Image showing 2 Bottles Shots of RULE 1 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 1 CASEIN: Manufactured in America, No Banned Substances, Gluten free

Reviews
Overall Rating
4.7 out of 5 stars
Reviews (366)
Verified Buyers (364)
Review Graph
  • 5 star
    82%

  • 4 star
    12%

  • 3 star
    4%

  • 2 star
    1%

  • 1 star
    1%

Top Rated Flavors
  • Chocolate Fudge (4.7/5 )
  • Vanilla Creme (4.7/5 )
  • Lightly Salted Caramel (4.6/5 )
  • Cookies & Creme (4.6/5 )
  • Chocolate Peanut Butter (4.5/5 )
  • Strawberries & Creme (4.3/5 )
  • Cookie Delight (4/5 )
  • Show More +
    Show Less -
Overall Rating
  • Cookies & Creme
  • Show More +
    Show Less -
User Image
Marc T
Verified Buyer
Have ordered this multiple times quality is always there. Keep it uo!*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-03-18 14:30:56Z
Loading
Overall Rating
  • Chocolate Fudge
  • Vanilla Creme
  • Show More +
    Show Less -
User Image
Andrew S
Verified Buyer
Great for long lasting protein delivery. Chocolate and vanilla are my go to, have not tried cookies and cream *
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-03-18 15:56:42Z
Loading
Overall Rating
  • Cookies & Creme
  • Show More +
    Show Less -
User Image
Blackheart
Build Muscle
Verified Buyer
Taste great. First time with Casin but it mixes will and just a little thick*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-03-15 16:13:36Z
Loading
Overall Rating
  • Strawberries & Creme
  • Show More +
    Show Less -
User Image
Mark F
Increase Strength
Verified Buyer
I tried this one because it was on sale. I am not the type who cares about flavor of my supplements. I pick the supplement based on what it has in it, not what it tastes like. That being said, this tastes absolutely horrible. I look at the number of servings and am depressed that I have to drink this everyday for 2 months. There are plenty of other brands with the same quality that taste fine, or even good. I won't be buying this one again.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-03-15 16:10:55Z
Loading
Overall Rating
  • Cookies & Creme
  • Show More +
    Show Less -
User Image
Jordan T
Verified Buyer
Phenomenal taste! Mixes really well, and overall is exactly what I was looking for.*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2024-03-10 12:15:25Z
Loading
Overall Rating
  • Cookies & Creme
  • Show More +
    Show Less -
User Image
Marc T
Verified Buyer
A little bit clumpy to mix at times but the taste more than makes up for it*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2024-03-09 12:01:48Z
Loading
Overall Rating
  • Vanilla Creme
  • Show More +
    Show Less -
User Image
Enrique R
Verified Buyer
Nice product. Taste good and it really does it works........*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2024-03-08 17:10:42Z
Loading
Overall Rating
  • Chocolate Fudge
  • Show More +
    Show Less -
User Image
Don S
Healthy Lifestyle
Verified Buyer
Best flavour, great replacement for those of us who can’t handle whey. Awesome for baking too if you’re into that*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2024-03-06 14:46:00Z
Loading
Overall Rating
  • Vanilla Creme
  • Show More +
    Show Less -
User Image
Nelson E
Verified Buyer
I love the taste of the vanilla crème and is perfect because I can add any fruits (banana, strawberries, etc..) I mix my Cesain Protein with milk and mix perfect..*
Was this helpful?
You found this not helpful
1 of 1 found this helpful
2024-03-06 14:46:00Z
Loading
Overall Rating
  • Strawberries & Creme
  • Show More +
    Show Less -
User Image
Ted Z
Verified Buyer
Mixes well. Strawberry flavor was a little more artificial than I was expecting. Think Strawberry Bubblicious instead of Strawberries & Creme.*
Was this helpful?
You found this not helpful
0 of 0 found this helpful
2024-02-25 12:03:45Z
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