Picking the 6 Best Casein Protein Powders

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There is no supplement or nutritional aide more popularized or commonly used than protein powder.

Whether that is in smoothies and shakes or the ever-present shaker cup of gym bro’s around the world, protein is not only a macronutrient staple of our diet but a staple for gym attendees and serious lifters alike.

Protein is not exclusively a gym supplement of course, but rather a vital macronutrient.

Our bodies need a certain number of macronutrients in order to function at their peak capacity. Macronutrients refer to the three primary building blocks of our nutritional profile in three categories: proteins, carbohydrates, and fats.

Of the three of these, the most important macronutrient for us to consume in order to maintain a healthy lifestyle and build muscle is protein.

Protein is one of the building blocks of our entire physiology and is made up of numerous amino acids that play a major role in almost every aspect of the human body. Protein can be found naturally in a variety of items, such as chicken, beef, fish, nuts, and eggs.

Consuming enough protein on a daily basis, especially for someone who is physically active and/or looking to build muscle, is not always easy. In addition, thanks to the anabolic window post-workout, we have a finite amount of time to consume protein that is quickly absorbed into the body to maximize our gains and recovery from strenuous workout sessions.

In these cases, protein powder processed from whey makes an ideal choice for ensuring that we get enough protein and at the right times to maximize our performance.

However, often unbeknownst to the common fitness enthusiast, protein powders are not exclusively whey, and more importantly, can have different functions as well.

While whey is a fast-acting and absorbing version of protein, it is only one half of the total protein package that comes from cows, our most common source of protein supplements.

The other source aside from whey protein is the curds or casein protein. Milk is separated into whey and curds with the curds usually being used for cheese products, however, when the curds are extracted more precisely they can create casein protein powder, which does not absorb nearly as quickly as whey but also does not burn out as quick for a long-lasting effect.

In this guide, we will break down exactly what casein protein powders do, what to look for when purchasing one and the best products on the market today.

Top 6 Casein Protein Powders

We have put together a list of our top recommended casein protein powder supplements. Each one has a short breakdown of its highlights, primary ingredients, and usages, as well as a brief profile for the company that makes the product.

Check them out, and look for the best option that not only comes highly recommended but fits your individual needs and desires for a casein protein powder supplement. We hope you enjoy and find the best product for you!

1. Optimum Nutrition Gold Standard Casein

Optimum Nutrition Gold Standard 100 Casein

This whey protein isolate from industry giant Optimum Nutrition is one of the best on the market, delivering a high-quality product and some of the best flavors available.

Product Highlights and Ingredients:

  • 24 g of casein protein per serving
  • Comes in a 2 or 4-pound tub
  • Has both natural and artificial flavors, along with several emulsifiers
  • Excellent brand and well-known company

Company Profile:

Optimum Nutrition, ON as it otherwise known, is one of the leading companies in the nutritional supplement industry and is the producer of this casein protein. They are best known for their Gold Standard line, particularly protein powders, however they are well known and respected for using scientifically proven ingredients and strategies in all of their products, making them a successful and respected brand.

Why We Recommend It:

This casein protein powder comes from one of the top protein powder manufacturers in the world, and though the inclusion artificial ingredients and sweeteners will not be ideal for more strict protein users, it is one of the best mixing options available, making it a great option for tasty bedtime shakes and smoothies.

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2. Naked Casein

Naked Casein

Naked Casein is as pure as it comes and one of the top casein options for pure casein protein and, quite literally, nothing else. It delivers 100% premium micellular casein in a large tub for easy use and pure casein powder.

Product Highlights and Ingredients:

  • 26 g of casein protein per serving
  • 4 g BCAAs per serving
  • Has 100% premium micellular casein
  • Zero additional ingredients, flavors, sweeteners or otherwise
  • Does not blend or mix particularly well as it has no emulsifying agents
  • US based
  • Cold pressed for minimal to zero chemical detergents

Company Profile:

Naked Nutrition prides itself on stripping away the marketing and gimmicks to sell only the purest products with the purest ingredients. They are best known for their protein powders and their lack of artificial flavors, sweeteners or other contaminants. Their strict approach to pure nutritional products has made them one of the fastest-growing companies on the market today.

Why We Recommend It:

This is one of the best options on the market for a casein protein product, especially for purists or those looking for a pure protein option with no contaminants or artificial ingredients. Due to its lack of emulsifying agents, it is less mixable or tasty than some competitors, but the quality of protein is one of the best.

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3. BulkSupplements Casein

Bulksupplements Casein Protein Powder

This protein powder from BulkSupplements may just be the best value for casein protein. They deliver a great product in bulk that has minimal ingredients for an easy to trust product at an excellent value.

Product Highlights and Ingredients:

  • 26 g of casein protein per serving
  • Delivers a solid amount of casein protein per serving
  • Comes in a zip-top bag, available up to 11 pounds per bag
  • Only two ingredients: powdered casein protein and soy lecithin for easy mixing
  • Not as smooth of a mix or tasty as some alternatives
  • Great value in bulk

Company Profile:

Bulk Supplements is a unique company in the sports nutrition market, as they specialize in providing only the powdered forms of pure supplements as opposed to varied formulas, blends, or other comparable products. Based out of Henderson, Nevada, they manufacture over 200 different pure ingredients in powder form both for sale in bulk or personal use. They are also a reputable brand, as they are registered with both the FDA and follow GMP standards.

Why We Recommend It:

This product is one of our top recommendations as it is one of the purest options available. It delivers a quality serving size and offers excellent protein powder quality at a reasonable price, making it one of the best values on the market. While the taste and mix quality may not be as good as some alternatives, it does have one of the best values available for the quality of protein and price per serving.

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4. Ascent Native Fuel Casein

Ascent Native Fuel Micellar Casein

Ascent Native Fuel Casein is one of the top casein protein products, delivering an excellent blend of both quality protein and mix-ability and taste. It is an ideal product for making protein shakes and smoothies without having any unneeded ingredients or harmful additions.

Product Highlights and Ingredients:

  • 25 g of casein protein per serving
  • 5 g BCAAs per serving
  • Excellent source of casein protein, at 25 grams per scoop
  • Includes cocoa powder, natural flavors, non-caloric sweeteners, monk fruit extract and stevia
  • Also has natural emulsifiers for easier mixing and blending
  • No artificial ingredients or superfluous extras
  • Great taste

Company Profile:

Ascent is an up and coming nutritional company whose stated goal is to be the official sponsor of hard work. They take a no-nonsense approach to nutrition and are committed to using real food ingredients with one primary end goal in mind, to naturally improve athletic performance.

Why We Recommend It:

If you’re looking for an excellent casein protein that actually tastes good and mixes well, then this product from Ascent may be the choice for you. While it does have some sweeteners and emulsifying agents that may turn off purists for casein protein, if you desire quality and taste for shakes and smoothies then this is the way to go.

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5. Dymatize Elite Casein

Dymatize Elite 100 Micellar Casein

Dymatize is best known for its functional proteins, and this casein product is no exception. It delivers quality casein, and most distinctly might be the best tasting option in the casein product category.

Product Highlights and Ingredients:

  • 25 g of casein protein per serving
  • Flavored with cocoa powder, natural flavors, and sucralose
  • Uses emulsifiers from soy and sunflower
  • Tastes great
  • Mixes very well
  • Not ideal for purists

Company Profile:

Dymatize Nutrition is a mid-sized supplement company originally founded in 1994 and has been in business producing quality products for over 20 years. They are known for a variety of products from protein powders to amino acids and are best known for high quality yet affordable products.

Why We Recommend It:

This casein protein is a safe choice from a well-established brand.  It delivers a solid amount of protein per serving that comes in one of the best tasting blends on the market. Combined with its easily mixed texture and it is one of the more convenient protein options. The soy and artificial ingredients included make it less ideal for serious lifters and purists, but overall it is a quality product.

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6. Six Star Casein Protein

Six Star Elite Series Casein Protein Powder

Six Star Casein Protein is as much meal replacement as it is a protein powder with one of the highest carbohydrate amounts out there. They also parse the casein protein with milk protein isolate, so the protein is not pure casein but a mixture.

Product Highlights and Ingredients:

  • Has a high amount of maltodextrin for additional carbs
  • Contains natural and artificial flavorings
  • Sweetened with sucralose
  • Casein blend is a mixture of casein and a high amount of milk protein isolate
  • Not ideal for pure casein protein powder use

Company Profile:

Six Star Pro Nutrition is not one of the larger nutritional supplement manufacturers but has several protein powder products. They are endorsed by pro baseball player Giancarlo Stanton and many positive reviews on Amazon.

Why We Recommend It:

This product is more ideal for those looking for a meal replacement option that utilizes casein protein due to the high amount of carbs and a high degree of milk protein isolate in the casein protein blend. It is not a great choice for purists or those looking for a pure casein protein product.

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What Are Casein Protein Powders?

Casein protein powders are supplements that deliver protein in powdered form for long-lasting use by the body.

Since whey is quickly absorbed, it is ideal for protein consumption in the anabolic window to maximize training effects and recovery but is rapidly absorbed and used.

Casein protein, on the other hand, is ideal for use before bed or long-lasting protein needs without an immediate spike.

Production of Casein Protein

The most common ingredient in casein protein powders is, of course, casein protein. More importantly in many cases, is the source and processing of the casein protein.

Protein powders take many forms depending on the initial source, and casein can be further classified based on its source and manufacturing.

For example, just as many users prefer beef that has been grass-fed or has not had any synthetic hormones injected over time, casein protein can come from the same source and many casein products will specify whether the source of the protein was grass-fed or hormone-free.

In addition, protein powders like casein protein tend to be mixed with other products or compounds, thus these ingredients must also be factored in, and users may want casein isolate, which means that the product contains only casein protein with no additional mixes or ingredients.

Precautions and Side Effects

Side effects from casein protein powder supplements are generally non-existent or at worst mild as long the recommended dosage is followed. That is a critical component of using casein protein powder supplements effectively, however, as the recommended dosage is what should be consumed and over-reaching for more can have side effects.

Side effects from casein protein powders may include bloating, digestive issues or overly dark urine, indicating a surplus of protein in the body. Most of these side effects tend to occur only when the recommended dosage has not been followed, thus the reason the recommended dosage is crucial.

In addition, if you have any particular food allergies or issues such as lactose intolerance, this will affect which casein protein powders make the best choice; if you have these issues or are not sure then consulting a medical professional is advised.

Overall, casein protein powder supplements are generally considered safe and effective as long as the recommended guidelines and dosages are followed.

We recommend consulting your doctor or medical professional before taking any supplements.

How to Pick a Good Casein Protein Powder

When choosing a casein protein powder, there are a variety of factors to take into account.

Your personal preferences will play a major part in finding the right selection for you, for example, if you prefer an unflavored powdered option you can mix with a drink or a flavored option that makes a tasty drink by itself.

Some casein protein powder supplements will skew towards a specific demographic or training goal, such as gaining mass or putting on lean muscle; your personal goals will need to align with the stated purpose of the product in order to see the best results.

The flavor is, of course, important and not all casein protein powders are particularly tasty. You’ll want to search for an option with a flavor you generally like to make the supplement more palatable and easier to use.

Finally, price and budget are a factor as well. When cross-referenced with your other needs, the best option will need to fit into your budget, and while you generally may get what you pay for, there are some very effective casein protein powders that won’t break the bank.

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