Signature Casein Signature

Signature Casein

25g of Slow-Release Micellar Casein
Muscle Growth and Recovery While You Sleep or Between Meals*
9.1  out of 10  (14 Reviews)
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For a limited time, buy 1 Signature Casein, 4 Lbs. & get 1 SmartShake Original2go One, 28 Oz. FREE!

Product Overview Signature Casein

Casein is naturally rich in amino acids like leucine and glutamine. Because of its slow-release nature, casein provides a steady stream of these amino acids to support muscle growth and recovery over several hours.* All of this makes casein the perfect nighttime protein! Enjoy it as a shake or pudding an hour before bedtime or during long stretches between meals. Casein


Building muscle isn’t just about consuming enough protein: It has to be the right protein. Whey protein digests quickly and is ideal for stimulating muscle protein synthesis after your workout. Casein, on the other hand, digests slowly and inhibits muscle protein breakdown.*

When you ingest whey protein, the amount of amino acids in your bloodstream rapidly peaks, then declines. Ingestion of casein causes a slow and steady increase of amino acids in your blood, supporting muscle recovery over a longer period of time.*

A signature is a promise. A symbol of your identity. Your mark on the world. In 1999, was founded on a single promise: Trust. It’s who we are and it’s in our blood. Our Signature line is built on the same promise. Every product is no-BS, transparent, filler-free, and formulated with effective doses of research-backed ingredients you can trust. We create the highest quality supplements, so you can focus on leaving a mark of your own.


Signature products are formulated with high quality ingredients at effective doses that we’re proud to share with you. We don’t hide anything in a “proprietary blend”, so you always know exactly what you’re putting into your body.


An effective dose is the amount of an ingredient that has been shown to deliver results. Some supplement brands add a sprinkle of an ingredient just so they can say it’s in the product. Signature supplements always include enough to get the job done.


Trendy, flash-in-the-pan ingredients come and go. But time-tested, gym-proven ingredients are what you need to help you achieve your fitness goals. That’s what you’ll find in Signature products because that’s what works.


Ratings & Reviews

Overall Rating
14 Ratings
Verified Buyer Rating
13 Ratings
Average Flavor Rating
2 Flavors
Top Rated Flavor
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Feb 16, 2019
Verified Buyer
  • 7 Vanilla

The first time I tried this, I thought it was a bit rougher to drink down than whey protein but, on the flip side, it's easy to get used to. The flavor is decent and adding a slow release protein helps give support throughout the day.

Jan 29, 2019
Verified Buyer
  • 10 Vanilla

Tastes great, I mostly use for my protein pudding/ protein cookie dough. can also just be mixed with water to drink I guess like most normal people do :P

Nov 04, 2018
Verified Buyer
  • 10 Chocolate

Tastes great with water!

Oct 16, 2018
Verified Buyer
  • 10 Chocolate

This casein powder is wonderful. Blends smooth and thick. No gritty texture and no compatibility issues in mixing with other brands. Keeping this one as a staple on the counter.

Sep 09, 2018
Verified Buyer
  • 8 Chocolate

Mixes great with a shaker, great taste, a tad too sweet. No problems digesting it.

Sep 01, 2018
Verified Buyer
  • 9 Chocolate

Excellent taste and blend well

Aug 16, 2018
Verified Buyer
  • 9 Chocolate

The casein mixes easily in a blender bottle with water and no clumping. The chocolate has a overly sweet taste but is still palatable. Tastes great when mixed in a blender with fruit and vegetables as a smoothie. I like that it is soy-free and will definitely purchase again.

Aug 15, 2018
Verified Buyer
  • 6 Chocolate

I recently purchased the chocolate casein and I don't regret my decision. I feel like the price of this product when compared to other companies is very convenient. The taste of the chocolate is ok but I can't wait for more of a variety. The part I like the most about this product other then the price is the nutrition when compared to other products.

Aug 14, 2018
Verified Buyer
  • 6 Chocolate
  • 6 Vanilla

Optimum Nutrition Casein has been my go to casein for a while but I thought I'd give the new Signature Casein a shot. In a head-to-head battle, this Signature casein is the loser. ON tastes better (both the chocolate and vanilla) and has a better consistency and mouth-feel. Signature casein is a bit off. I will be going back to ON.

Aug 01, 2018
Verified Buyer
  • 9 Vanilla

I love it. Bought the chocolate too and can’t wait to try it! I will definitely buy again.

Jul 23, 2018
Verified Buyer
  • 10 Vanilla

Pretty good flavor and mixes well with milk in a shaker. I personally don't think it's too sweet compared to other brands, it's a bit "chalky" but I'd rather have that than have it too sweet. I'll be buying more.

Jul 19, 2018
Verified Buyer
  • 8 Vanilla

The vanilla is extremely sweet, but it blends in water better than some other casein brands I have tried before.

Jul 16, 2018
Verified Buyer
  • 10 Chocolate
  • 10 Vanilla

Thank you for developing such a great protein powder. Absolute best tasting protein powder I ever had next to the original Pro Jym before they changed. Pro Jym is now disgusting which forced me to try a new protein powder and I am so happy that I did find the best which is the Signature Series line.

Jun 23, 2018
No written review.
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Price: $49.99  ($0.91 / Serving)
Flavor Rating: 8.5

What's in Signature Signature Casein

Serving Size: 1 scoop (33g)
Servings Per Container: About55
Amount Per Serving
Calories 120       
Calories from Fat 5       
% Daily Value *
Total Fat 1 g 2%
Saturated Fat 0 g 0%
Trans Fat 0 g       
Cholesterol 20 mg 7%
Sodium 210 mg 9%
Total Carbohydrate 3 g 1%
Dietary Fiber 2 g 8%
Sugars 0 g       
Protein 25 g 50%
Vitamin A 0%
Vitamin C 0%
Calcium 50%
Iron 4%
* Percent Daily values are based on a 2,000 calorie diet. Your Daily Value may be higher or lower depending on your calorie needs.
Micellar Casein, Cocoa processed with alkali, Inulin, Natural and Artificial Flavor, Salt, Sunflower Lecithin, Acesulfame Potassium, Sucralose, Gum Blend (Cellulose Gum, Xanthan Gum, Carrageenan).
Contains Milk.

Directions For Signature Casein: Add one scoop to 8 ounces of cold water or milk and mix thoroughly. Use more or less liquid to modify the consistency to your liking. Enjoy at bedtime or between meals.

Warnings: Use this product as a food supplement only. Do not use for weight reduction.

* 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.