Review Graph
Top Rated Flavors
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Most Recent
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Most Helpful
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All Reviews (691)
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Verified Buyers (688)
Ryan W
Verified Buyer
Love this product. Definitely the best bang for your buck you can find for Casein.*
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Kevin G
Verified Buyer
Love this protein the vanilla flavor is amazing. Take it every night before bed. Will buy it again. *
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Ted Z
Verified Buyer
This is my go-to casein protein. It mixes well and tastes great.*
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Frank G
Verified Buyer
Been using this consistently for a while now. Quality product that mixes easily and tastes great.*
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Shamim B
Healthy Lifestyle
Verified Buyer
Really high quality stuff as far as I can tell. Tastes great for a protein powder. Use it for my cuts to make me feel fuller longer! Highly recommend. *
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Ek Balem 7
Verified Buyer
Maybe Because Is Casein Protein I'm Having A Little Difficulty Mixing It. I Don't Usually Have Any Problem With The Rule 1 Whey.*
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Joseph S
Build Muscle
Verified Buyer
Super high-quality, long lasting, taste fantastic… I love this!*
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William R
Verified Buyer
Easily my favorite casein to make casein protein pudding in my Ninja. I use it every night*
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Michael Husko
Build Muscle
Verified Buyer
It helps me sleep and gives me the extra protein I need at night*
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Matt F
Verified Buyer
Always great protein and a great price from M&F as well as decent shipping. The cookies and cream flavor is a smidge artificial but the strawberry is great and was a nice break from vanilla. I don't care for their chocolate.*
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Steve L
Verified Buyer
I love this protein but I drink it with just water right before I go to bed and it's a little too sweet for me. I wish they would offer a no flavor plain option but either way, I will keep purchasing this product.*
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Lori B
Verified Buyer
Been using it for a couple years. Way cheaper than the ‘name brand’ and virtually the same results!*
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Kyle R
Verified Buyer
I got this protein at a great deal. Ive reached all over for casein that was reasonably priced and finding this on sale at $47/ 4lbs was a fantastic find. I ordered 2 more tubs just to stock up.
Flavor wise, most casein ive tried were not great tasting at all but this was manageable. Better than some other casein flavors ive tried like MyProtein but could be better. Overall id recommend this product*
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Brandon W
Verified Buyer
Tastes great! Works great to thicken Greek yogurt and oatmeal! I've purchased a number of Rule 1 products and they've always satisfied.*
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Ted Z
Verified Buyer
I have this every night before bed. Vanilla is a good base for mixing in other flavors.*
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Connor Diill
Verified Buyer
Probably the best tasting casein protein on the market. My go-to.*
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Lou C
Verified Buyer
Been using for years! Very happy with service and quality! We use vanilla and chocolate.*
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Frank G
Verified Buyer
I love this product and the Vanilla Creme flavor. I mix this with Greek yogurt and peanut butter as my last meal before bed.*
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Thibaut D
Verified Buyer
Great ingredient and tasttes good, very thick which is typical*
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Thibaut D
Verified Buyer
good ingredients and tastes great - mixing is very thick but thats typical for casein*
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Peter K
Burn Fat
Verified Buyer
Very good flavor and filling. Keep up the awesome work by go*
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Nav S
Verified Buyer
I’ve been using r1 casein for a few years now. I never been let down *
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Ronald M
Verified Buyer
Delicious and makes everything you mix it in super thick. Great macros as well with decent value per serving.*
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Patty F
Build Muscle
Verified Buyer
I love this! Great taste. A little thicker than regular Whey*
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David B
Build Muscle
Verified Buyer
Very good powder. Tastes very strong and sweet. Will continue to get. Helps me stay full throughout the day and night.*
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Bryan
Verified Buyer
Its not my favorite cookies and cream taste and its a lot thicker than my whey protein, but its still good tasting. I wanted a casein protein for before bed and it definitely does its job. I recommend for sure.*
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Michael S
Verified Buyer
Very good thick consistency for pudding. However, the vanilla doesn't taste like vanilla. It is extremely sweet on my palate to leave it without any definite flavor.*
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Bryan R
Verified Buyer
Love mixing this with my morning oats. Tastes delicious and gives me the perfect amount of energy before a workout. *
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Donald D
Verified Buyer
Nice product. Mixes well. I am hooked on casein over night. Works*
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Pete D
Build Muscle
Verified Buyer
Mixes well with water. Satisfies my after-dinner cravings. I add 30grams of granola for a crunchy texture.*
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Vincent B
Verified Buyer
It’s the cleanest best tasting best mixing casein protein I’ve used and been training for 22 years, zero issues with stomache ache or bloat, highly reccomend this product*
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Anthony A
Build Muscle
Verified Buyer
Great vanilla flavor, my go to mixed with greek yogurt and fruit*
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Ted Z
Verified Buyer
I love this Casein protein powder. My cheat is to buy flavored extracts and mix them in, then pop it in the freezer for a while to have an "ice cream" treat before I go to bed.*
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Frank G
Verified Buyer
I've been using this Casein for a while now. It mixes great in a shake or I also like to mix it with some Greek yogurt and PB. It has a creamy, smooth taste, unlike some other powders than can have a chalky taste. It is a great product for the price as well.*
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Matthew V
Build Muscle
Verified Buyer
The best casein protein I have ever had. Flavor is awesome especially with milk.*
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Joshua S
Build Muscle
Verified Buyer
Mixes very well and I feel full throughout the night. No issues.*
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Randy P
Verified Buyer
Very thick but chocolate is kind of like a brownie tasting so it's good to bake with*
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Jason F
Burn Fat
Verified Buyer
Best Casein protein on the market. Love to add to pancakes to add additional protein. Cooks very well.*
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Jason G
Burn Fat
Verified Buyer
It doesn't get any better than Cookies and Cream before bed!*
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Heather C
Build Muscle
Verified Buyer
First time I tried this protein. It was a decent price for the product. Flavor definitely needed to be mixed with something to give it taste. Not my favorite.*
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Jeremy M
Build Muscle
Verified Buyer
First time trying Rule 1 and it doesn't disappoint on flavor or nutritional breakdown. Good price per service, mixes well in milk or water, and delivers on what it says.*
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Donald D
Verified Buyer
Nice product. Mixes well has good flavor. Im new doing casien *
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Heather C
Build Muscle
Verified Buyer
I would really like to review this but was sent two times and I never received. Never scanned delivered by post office.*
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Scott P
Verified Buyer
Rule 1 Casein fits perfectly into my nightly Arnold‑meets‑Matthews approach, giving me the slow, steady protein stream that keeps a 53‑year‑old sculptor’s body growing while I sleep. It supports my disciplined wind‑down routine, keeps recovery predictable, and aligns with my long‑game pursuit of a classical Greek physique. Clean, reliable, and built for my goals.*
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Levi
Verified Buyer
The right stats for the right price. Can't complain and that's all.*
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Steve
Sports Improvement
Verified Buyer
Mixes well and tastes great.
Does not clump in the scoop as some have*
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Michael Husko
Build Muscle
Verified Buyer
The One that really works and has a great taste and helps me sleep*
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Ted Z
Verified Buyer
Great mixing protein for right before bed. Vanilla is great for mixing in other flavors.*
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Vincent B
Verified Buyer
Best tasting easiest mixing and the best digesting protein I’ve ever used *
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Frank G
Verified Buyer
This is a great slow digesting protein at a great price. The Vanilla Creme tastes good on its own and also easily mixes in with other things like peanut butter or chocolate chips.*
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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.
