3 Best Casein Protein Supplements to Build Muscle As You Sleep

By now you probably know that not all protein types are created equal. But, no matter if we’re talking about whey, hemp, soy, egg, pea and the like, they all come with their own unique advantages.

When it comes to casein protein, it all boils down to timing. This type of protein is known for providing the human body with a slow yet steady stream of amino acids which can last for hours at a time.

So, if you are on the lookout for the best casein protein, the next three supplements are here to throw their hats in the ring and wow you with their overnight muscle building potential.

Why Casein Protein?

Next to whey, casein protein is one of the most popular types of protein out there these days. Why? From the moment casein enters your body, it interacts with stomach acid and forms a gel. This gooey substance created in the stomach delays the rate at which the body absorbs amino acids and releases them in the form of protein into the bloodstream.

As a result, only a small amount of amino acids get to reach the muscles. In other words, consuming casein protein reduces the rate at which muscle protein is broken down helping you retain more muscle mass.

At the same time, the gradual release of amino acids may help you build muscles overnight. Unlike other types of protein, the gel-like substance created from ingesting casein provides a steady source of amino acids which lasts for hours. With that in mind, consuming a casein-packed shake right before bed is your best chance at producing muscle protein even if you are sleeping.

3 Best Casein Protein Supplements

  1. Optimum Nutrition Gold Standard 100% Casein Protein Powder by Optimum Nutrition

Combining convenience, top-notch ingredients and a wide range of delicious flavors, it’s no wonder this casein protein supplement is one of the best on the market these days.


  • It prevents muscle breakdown AND facilitates muscle recovery through its slow-digesting protein formula.

  • It is the ideal component for nighttime shakes, fasting diets and any occasion when your body needs to go without food for hours. In fact, it provides the body with a slow digestion and absorption of amino acids and nutrients.

  • It comes in ten delicious flavors which accommodate everyone’s taste.

  • The price is quite affordable.

  • It helps you lose fat as it makes you feel full for longer.

  • It is produced in GMP-compliant facilities.

  • It mixes well not only with water but with dairy products providing you with dessert-like alternatives.

  • It also contains almost five grams of naturally occurring BCAAs (Branched-Chain Amino Acids), Glutamine and Glutamic acid per scoop. This way you are also promoting protein synthesis in muscle.


  • Most users usually complain about the protein’s texture, meaning it doesn’t mix thoroughly leaving thick powder chunks in the shake.

  • According to most, the cookie dough flavor is by far the worst.

  1. MuscleTech Platinum 100% Casein by MuscleTech

Featuring a large set of core muscle-building competencies, MuscleTech Platinum 100% Casein is definitely one of the best options to look for as you cruise through the supplement aisle.


  • Much like all the items on this list, this casein protein supplement prevents muscle breakdown, even up to 34%.

  • It also provides the body with all the necessary nutrients to synthesize protein such as Glutamine, protein, and BCAAs.

  • The formula of this casein protein supplement contains more protein per scoop than other competitive brands.

  • The price is budget-friendly.

  • It features three unique flavors to match your taste.

  • The formula is filtered to perfection and doesn’t contain any lactose, fat and ash residuals.

  • Unlike other casein protein formulas, this one is made of the purest form of casein, known as micellar, which includes several bioactive fractions (Alpha S1 Casein, Alpha S2 Casein, Beta Casein, Kappa Casein).


  • It may give you flatulence, much like most processed protein powders.

  • It tends to blend poorly and form small powder clumps even if you shake well.

  • The strawberry shortcake flavor may be a bit of a miss.

  • It consists of Sucralose and Acesulfame Potassium which are the scientific term for “ The product you are about to use contains artificial sweeteners”.

  • The guarantee status is a mystery as there is no info on the company’s website concerning the issue.

  1. Mutant Micellar Casein Protein Powder by Mutant

Contributing to lots of benefits such as lower cholesterol levels, greater fat loss and boosting immunity, this casein protein powder is definitely worth your attention. Wanna know why?


  • It prevents your muscles from slipping into a catabolic state (breakdown of muscle protein). That is especially beneficial during prolonged fasting sessions and before you go to sleep.

  • It is cost-effective.

  • It contains the purest form of casein protein, also referred to as micellar casein.

  • It satiates your hunger making avoid overeating.

  • It blends smoothly with water and dairy products such as milk, Greek yogurt and cottage cheese for some extra protein.

  • According to one study, a diet rich in casein protein promotes weight loss and lean muscle gains.


  • If your body doesn’t handle casein protein well, even small amounts of it may make you bloated.

  • This supplement contains Sucralose which is an artificial sweetener.

  • You should also avoid it if you are allergic to wheat, corn, eggs and fish as this supplement is produced on machinery which handles these foods. So, cross-contamination is a possible side effect.

The Takeaway

At the bare minimum, it’s always wise to do a little research before making any supplement part of your everyday nutrition. But, let’s consider all the benefits casein protein may provide to your body, especially when it comes to catabolism prevention. Not to mention that some of them contain enough amino acids (BCAAs, Glutamine, Glutamic acid) to boost your pumps even more.

So, if you are ready to take your muscle building goals up a notch, these are the three best casein protein supplements to do the trick hassle-free.


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