Review Graph
Top Rated Flavors
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Most Recent
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Most Helpful
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All Reviews (275)
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Verified Buyers (273)

Ilija S
Verified Buyer
Satisfying, good quality and more then need during sleep and after late workout *
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Anthony A
Build Muscle
Verified Buyer
Great vanilla flavor and a great protein powder especially for baking. I use this in my protein waffle and pancake recipes and it works perfect for both batter consistency and taste. A+ protein powder and a great value when it goes on sale.*
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Calvin S
Build Muscle
Verified Buyer
Didn’t realize there is a cancer warning!!!! Buyer beware!!! And mess up your future kids!!!!*
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Brian S
Verified Buyer
Rule 1 vanilla casein is a great night time protein for me.*
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Ricardo G
Increase Strength
Verified Buyer
Great tasting Casein! An abundance for an inexpensive price. *
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Reps for Jesus
Verified Buyer
Cookies and cream tastes great. And it’s a great supplement to have when before I go to bed for the night. *
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Frank G
Verified Buyer
I use this casein at night before bed. Mixes easily in with Greek yogurt and peanut butter.*
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SERGE D
Build Muscle
Verified Buyer
I simply love it!!! Especially at the price I was able to get it. So, I got two!
It's very hard to say anything more than that.*
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Timothy W
Verified Buyer
Love the slow digest casein. Mixes well for the product type. Tastes great too. I like powder, banana and a little peanut butter blended with milk and icez*
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Aaron C
Burn Fat
Verified Buyer
Mixes well in a shaker, flavor is OK, not the best I've ever had but not bad*
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JOAO C
Verified Buyer
It’s been a while since last time I bought casein. The texture is so thick and weird and even the taste is completely different than whey protein or other protein blends. Not buying again. *
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Robert W
Verified Buyer
Flavor is better then the chocolate one I last tried. Great protein to take before bed to ensure slow digesting *
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Michael C
Verified Buyer
Take this every night before heading to bed to make the most of muscle recovery and building.*
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Anna B
Build Muscle
Verified Buyer
Tastes so good before bed. Have to add a little extra water so it’s not so thick. *
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Aaron J
Verified Buyer
Phenomenal taste. I rarely get casein, so now using it, I definitely feel fuller longer. Highly recommended.*
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Stillyourset
Verified Buyer
Good deal for the money. Its very hard to mix, takes about twice as much water vs whey protein. Flavor is not the best, but could be partly due to the chalky texture*
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Tony H
Contest Preparation
Verified Buyer
I enjoy the taste, the mixability leaves something to be desired. But it is a Casein, so it will naturally take more liquid from what I have found with similar casein powders. However, it is working as the slower digesting protein keeps me fuller longer.*
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David B
Build Muscle
Verified Buyer
Very good taste. Will get again. Helps keep me full past bedtime. I also use sometimes between meals.*
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Daniel C
Build Muscle
Verified Buyer
Good product. It's pretty chalky out of the container but blends nicely. I have to use half water and half milk because it will be too thick to drink. I will continue to use R1 for my casein whey needs.*
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JOHN R
Verified Buyer
Rule 1 Casein is a great tasting, slower digesting protein that I use before bed.*
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Anthony W
Verified Buyer
The product tastes great, and does what it needs to do. I would order it again.*
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Greg K
Increase Strength
Verified Buyer
Great taste and just the right feeling of "full" for bedtime.*
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Dustin W
Build Muscle
Verified Buyer
3-4 on flavor, I like the quality of this casein for the money*
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Daniel C
Build Muscle
Verified Buyer
R1 has great taste and price. Will continue to buy this product.*
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Melissa B
Build Muscle
Verified Buyer
Yum. Good casein. Rule 1 hasn't let me down once yet. Would buy again*
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Bob w
Healthy Lifestyle
Verified Buyer
Easily my favorite brand of casein protein. Cookies n cream is good, but the vanilla, and chocolate peanut butter are better*
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Steven K
Verified Buyer
Mixes well and tastes good too. I would recommend this product!*
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Kevin D
Verified Buyer
Rule 1 Casein has always been top quality. Cookies and cream is one of the best flavors the brand offers.*
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Brad Y
Verified Buyer
This stuff is amazing, I can just put milk in a bowl and mix this with a whisk. Mixes up just fine.*
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Carlos C
Verified Buyer
Flavor taste more like melted pecan ice cream and texture is thick but it seems to work, I don't feel much empty stomach when I woke up, since I use this protein before bed.*
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Christopher H
Verified Buyer
Great value and good taste--not as thick and chalky as other caseins.*
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JOHN R
Verified Buyer
This is my go-to Casein Brnad and flavor. It mixes great with water without clumping.*
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RustySquirrel
Burn Fat
Verified Buyer
Good flavor and gets the job done and pretty good price for the amount*
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Maria M
Healthy Lifestyle
Verified Buyer
Delicious, clean, pure and with an unbelievable price! Loved every flavor*
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Alan G
Verified Buyer
Strawberries and cream has a slight artificial sweetener taste to it but it’s quality stuff and mixes much better than other brands I’ve tried.*
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Connor Diill
Verified Buyer
This is the best tasting Casein I have ever had. I cannot recommend this highly enough.*
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Daron C
Verified Buyer
Casein is nasty by nature, but Rule 1 takes away some of the gritty griminess and makes it at least tolerable. Easily my favorite Casein by far!*
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Dustin W
Build Muscle
Verified Buyer
Very thick of you don't use the correct amount of liquid. Taste is ok*
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Jimmy D
Verified Buyer
Mixes well, I use it it make protein pudding and taste really good for a casein protein *
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Kevin H
Healthy Lifestyle
Verified Buyer
Flavor is great it’s like a small shake before you go to bed just enough protein so the body can work to develop your body while you sleep *
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Michael M
Verified Buyer
Love this protein, I use it in my before bed shake.
Nice thick consistency and mixes easily.*
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Anthony A
Build Muscle
Verified Buyer
Great vanilla flavor, works great for baking protein pancakes, waffles, muffins or banana bread!*
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Vincent B
Verified Buyer
Best mixing casein protein on the market, smooth mix, no clumps, great taste *
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Sparky
Build Muscle
Verified Buyer
I like the flavor, but if I don't use a blender, it's a bit grainy. I'll definitely buy these products again!*
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Robert
Verified Buyer
The chocolate tastes just like chocolate milk! Really good profile, no bloating, mixes well. Really liking r1, especially at this price point, a great value. Gonna have to try their whey too, they seem very legit.*
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Frank G
Verified Buyer
I love mixing this in with some Greek yogurt and peanut butter. Tastes delicious and mixes easily!*
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Charles P
Healthy Lifestyle
Verified Buyer
Clumps and sticks to the side of the blender.The chocolate taste like it went through on STILTS. I bought it for the price,as they say”you get what you pay for “..*
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Kevin F
Build Muscle
Verified Buyer
This mixes well but becomes unbelievably thick. Which is easily solved by adding more water. Just not trying to drink anymore water than I need to before bed so I don't wake up having to pee. Strawberry and cream is pretty bad tasting.*
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JOHN R
Verified Buyer
This is a great tasting Casein Protein. I use it at night to get slow releasing protein while I'm sleeping.*
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DAVID B
Transformation
Verified Buyer
Good so far. Anxious to try another flavor. Will order again.*
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* 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.