Our ReviewSixStarCasein Protein +

SixStar Casein Protein + offers 24g of slow-digesting protein per serving, perfect for overnight muscle recovery. Ideal for athletes and fitness enthusiasts.
SixStar Casein Protein +

SixStar Casein Protein + is a supplement designed for those seeking sustained protein release. This product features a blend of micellar casein and milk protein isolate, both known for their slow-digesting properties, making it ideal for muscle recovery while you sleep. With each 40g serving providing 24g of protein, this supplement supports prolonged amino acid delivery to your muscles.

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SixStar Casein Protein +
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SixStar Casein Protein + includes a blend of casein and milk protein isolate, which are excellent sources of slow-digesting protein. This makes it particularly effective for muscle recovery during prolonged periods without food, such as overnight. Casein is known for its ability to provide a steady release of amino acids, which can help to sustain muscle protein synthesis and reduce muscle breakdown. This blend ensures a continued supply of nutrients, supporting muscle repair and growth effectively.

Protein Matrix
Milk Isolate
Micellar Casein

In addition to the protein blend, SixStar Casein Protein + includes several other ingredients. Maltodextrin has been added as a carbohydrate source. However, we would question its suitability for use in a protein powder that is generally used before bed. We will talk about that more later.

Cocoa gives the product its chocolate flavor. The product also contains natural and artificial flavors, along with a gum blend (cellulose gum, xanthan gum, carrageenan) that helps with texture and mixability. The inclusion of artificial sweeteners like acesulfame potassium and sucralose here is also a common practice to keep the calorie count. However, some may prefer to avoid artificial sweeteners due to personal health concerns or dietary preferences.

Soy or sunflower lecithin is included to aid in the product's solubility and consistency when mixed with liquids. While generally considered safe, soy lecithin might be a point of concern for those with soy allergies.

Reviewed Product
 Casein Protein +
Reviewed Flavor
Triple Chocolate
Product Ingredients
Casein protein blend (milk protein isolate [supplying micellar casein and whey], micellar casein), maltodextrin, cocoa (processed with alkali), salt, natural and artificial flavors, gum blend (cellulose gum, xanthan gum, carrageenan), acesulfame potassium, sucralose, soy or sunflower lecithin.
Label Endorsed As
Milk, Soy
May contain traces of
wheat, tree nut, egg



SixStar Casein Protein + is designed to provide a sustained release of protein, making it particularly effective for muscle recovery and growth during periods of fasting, such as overnight. Each serving contains 24 grams of protein, primarily from micellar casein and milk protein isolate. These sources are known for their slow digestion rates, which ensure a steady supply of amino acids to the muscles over several hours.


The inclusion of micellar casein is a significant advantage, as it is considered one of the best forms of casein protein. Micellar casein forms a gel-like substance in the stomach, leading to a slow release of amino acids into the bloodstream. This slow digestion rate is beneficial for preventing muscle breakdown and promoting muscle protein synthesis throughout the night, which aligns well with the product’s marketed purpose.

Milk protein isolate in the blend provides a mix of both casein and whey proteins. While whey is fast-digesting and rapidly increases amino acid levels in the blood, casein's slow-digesting nature complements it by offering prolonged amino acid delivery. This combination ensures that the muscles receive immediate as well as extended protein support, enhancing overall effectiveness for muscle recovery and growth.

The product’s low fat content, at just 0.5 grams per serving, is commendable. However, the carbohydrate content, primarily from maltodextrin, is relatively high at 9 grams per serving. While maltodextrin can be beneficial in a whey protein product post-workout for replenishing glycogen stores, its presence in a casein protein meant for overnight use is surprising. The primary purpose of casein is to deliver a slow, steady release of amino acids to prevent muscle catabolism during long periods without food. Adding carbohydrates like maltodextrin could lead to the storage of unused carbs as fat if the energy is not expended.

However, there could be some rationale behind this formulation. For instance, if used after an evening workout, this product could be beneficial. The moderate carbohydrate content from maltodextrin can help replenish glycogen stores post-exercise, while the milk protein isolate, which includes whey, provides an immediate supply of amino acids during the anabolic phase after your workout. This combination can support both immediate recovery needs and sustained muscle repair overnight.



When you open SixStar Casein Protein + in the Triple Chocolate, you know it's going to be a rich chocolaty experience from the cocoa aroma. It doesn't disappoint, and triple chocolate is the decadent flavor you get.

When mixed with water, the powder dissolved quite easily with minimal effort, leaving no clumps. The texture is smooth and thick but not overly so, which is ideal for a casein protein shake intended to sustain you overnight. Mixing the protein powder with milk gives it a creamy consistency that perfectly complements the rich chocolate flavor, delivering a satisfying chocolate taste.



SixStar Casein Protein + positions itself as a mid-range protein powder, offering a blend of quality ingredients at a reasonable price point. The primary sources of protein, micellar casein, and milk protein isolate, are well-regarded for their slow digestion rates, which are ideal for sustained muscle recovery overnight. This ensures a steady release of amino acids, supporting muscle repair and growth during periods of fasting, such as sleep.

Relative Cost

However, the product's value is nuanced by its inclusion of maltodextrin, which contributes to the 9 grams of carbohydrates per serving. While maltodextrin can aid in glycogen replenishment post-workout, its necessity in a nighttime protein supplement is questionable. For those who do not utilize these carbs, there is a risk of them being stored as fat, which diminishes the product's value compared to other casein proteins with lower carbohydrate content, in our opinion.

Despite this, SixStar Casein Protein + excels in mixability and taste, making it a pleasant option for nightly consumption. The chocolate flavor is rich and enjoyable, and the powder blends smoothly with both water and milk. This user-friendly aspect adds to its appeal, especially for those who prioritize flavor and ease of use.



SixStar Casein Protein + offers a solid blend of micellar casein and milk protein isolate, delivering effective overnight muscle recovery. The blend of micellar casein and milk protein isolate ensures a steady amino acid delivery, crucial for preventing muscle breakdown during long periods without food.

The inclusion of maltodextrin, contributing to 9g of carbohydrates per serving, is a nuanced aspect. While beneficial post-workout for glycogen replenishment, its necessity in a nighttime protein supplement is debatable. Those not using these carbs may find them stored as fat, which affects the product's competitive edge compared to other lower-carb casein proteins.

Despite this, the product shines in taste and mixability. The rich chocolate flavor is enjoyable and the powder blends smoothly with both water and milk, making it a pleasant nightly option. Its affordability further enhances its value, especially for those prioritizing taste and ease of use.

Overall, SixStar Casein Protein + is recommended for athletes and fitness enthusiasts needing an effective, mid-range nighttime protein, ideally for use after an evening workout. Its strengths in taste and mixability make it a user-friendly choice, although those avoiding additional carbs may want to explore other options.

SixStar Casein Protein +

Where to buy?

We recommend Amazon, as they consistently provide the best prices and quickest shipping.

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