Optimum Nutrition Casein Protein Powder

Casein protein powder is a slow-digesting dairy-based protein that provides a steady release of amino acids to the muscles over several hours. It’s ideal for use before bed or during long periods without food to support muscle recovery and prevent muscle breakdown.

The best time to take casein protein is before bedtime, as it fuels your muscles with protein throughout the night while you sleep. It’s also great between meals when you need long-lasting satiety and muscle support.

Whey protein digests quickly and is ideal for post-workout recovery, while casein digests slowly, making it perfect for overnight recovery. Both are effective, and many people use a combination of the two depending on specific training and nutrition needs.

Some casein protein powders contain low levels of lactose, but not all are suitable for those with lactose intolerance. If you're sensitive to lactose, look for products labelled as lactose-free or choose non-dairy protein powders. We always recommend consulting with your healthcare provider before use.

Yes, casein protein supports muscle repair and growth by delivering a steady stream of amino acids over time. This helps reduce muscle breakdown and supports lean muscle maintenance, especially during sleep or fasting periods.