Casein Protein
Night‑Time Casein Protein Powder
Casein is the main protein found in cow's milk, making up about 80% of its total protein content. The remaining 20% is whey, which is used to produce whey protein supplements. In milk, casein occurs in the form of spherical structures known as micelles.
Due to this complex structure, casein proteins take longer to digest than whey proteins, resulting in a slower release of amino acids into the bloodstream. Therefore, casein is not the best post‑workout protein supplement but remains a good source of high‑quality protein during the day and especially in the evening, hence the name "night‑time protein".
Types of Casein Proteins
Depending on the production technology, you may come across several types of casein proteins, each with slightly different properties:
- Caseinate is produced by denaturation, during which it loses its original structure. Caseinates are considered lower‑quality casein proteins, as they do not contain the original bioactive protein fractions and have poorer absorption and utilization rates.
- Micellar casein is regarded as the highest‑quality and best night time protein on the market, produced by the CFM (Cross‑Flow Microfiltration) method. In the acidic environment of the stomach, micellar casein forms a gel, which gradually passes into the digestive system, allowing for better absorption and utilization.
- Casein hydrolysate is a less common, enzyme‑treated form of casein that allows for maximum absorption. A minor downside is the slightly shortened digestion time and higher price. If you’re aiming for faster absorption, whey protein may be a better option.
Why Use Night‑Time Proteins?
Casein proteins have earned their place among protein supplements thanks to their unique properties. Key benefits include:
- Protein content of 70‑80%,
- Long digestion time (around 4 hours for 30g,
- Support of recovery processes,
- Promotion of muscle growth,
- Reduction of muscle mass catabolism.
Although casein proteins are often called "night‑time proteins," they can also be consumed during the day, especially when you anticipate not eating a protein‑rich meal for an extended period and want to prevent muscle breakdown.
Unlike whey proteins, casein contains lower levels of leucine, an amino acid that significantly supports anabolic effects. This can be compensated for by taking BCAA supplements or mixing casein with whey protein. Protein blends are also a good solution to this issue.