2021's 10 Best Casein Protein
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Best Casein Protein

Casein protein doesn’t get much attention outside of the bodybuilding world, but it has a lot to offer.

Casein makes up about 80% of the protein in milk and is one of two proteins found in milk, the other being whey. When dehydrated and powdered, casein offers a high-quality, slow-releasing and bioavailable source of amino acids. It’s known for boosting muscle mass, fat loss and exercise recovery.

The Difference between Casein and Whey Protein

Casein and whey protein are both by products of cheese-making and excellent sources of all the amino acids.

While whey is digested and absorbed rapidly, casein is absorbed at a slower rate and remains in the body for longer. Casein provides you with a gradual supply of amino acids over hours. Plus, it makes a thicker and creamier protein shake than a whey equivalent.

Casein Powder Health Benefits

Casein powder provides a rich source of branched-chain amino acids (BCAAs) and 9 essential amino acids that aren’t made in the body. These are the building blocks of proteins needed for growth and repair.

We need amino acids to create:

  • All cells and tissues
  • Hormones
  • Enzymes
  • Immune cells

It’s a great post-workout supplement for people with low protein intake and those with higher protein demands, like athletes and elderly people.

Encourages Muscle Growth

Casein powder allows you to get the most out of your workout by improving strength and performance.

When used in conjunction with resistance training, it provides the amino acids to rapidly repair muscle fiber tears inflicted during exercise and stimulate muscle protein synthesis (MPS) or muscle growth.

A 2015 study on young men doing resistance exercise had them consume a casein protein supplement or a placebo before bed for three months. The results found that muscle gains and strength were significantly greater in the casein protein group.

Promotes Muscle Recovery and is Anti-Catabolic

Your muscles recover, repair and grow during sleep – but only when enough amino acids are available.

A study looked at residents of Wanshan, China who had high levels of mercury exposure. They were given yeast enriched with 100mcg selenium daily for three months. Promisingly, the selenium supplement successfully increased levels of mercury excreted from the body.

A 2012 study found that consuming casein protein 30 minutes before bed rapidly increased circulating amino acid levels, with levels remaining high throughout the night. This notably improved muscle protein synthesis and muscle recovery overnight.

Encourages Fat Loss

Casein powder encourages fat loss while preserving muscle mass.

This slow-release protein is satiating, curbing the urge to snack on excess calories. It also stimulates your metabolism, boosting the calories burned overall.

A three-month study on overweight police officers looked at the impact of casein protein or whey protein on body composition when combined with resistance training and a calorie-restricted diet. All groups lost fat, but at the end of the study the casein group had:

  • A three times greater loss of fat compared to the placebo group
  • A higher percentage of lean muscle mass overall
  • More strength in the legs and upper body

Casein Powder Considerations

Casein protein is unsuitable for those with lactose intolerance as it is higher in lactose than other protein powders.


2021's 10 Best Casein Protein
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*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

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*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

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*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.

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*Individual Results May Vary - Ratings are based on Society Health Ranking System and do not necessarily reflect typical results from the use of these products. We encourage consumers to research by visiting each product's website for more information.