While casein protein powder derived from milk typically contains some lactose, it is not completely lactose-free. Individuals who are lactose intolerant may experience discomfort such as bloating and gas due to the presence of lactose. Casein is valued for its slow digestion rate, which provides a prolonged release of amino acids (1).
As an alternative to casein, egg white protein is an excellent option for those avoiding lactose. Egg white protein digests at a slower rate than many other protein sources, though not as slowly as casein, however, it is a suitable substitute for providing sustained amino acid delivery without the lactose. It's important to consult nutritional labels or seek guidance from a healthcare provider to ensure dietary compatibility.
- Phillips, S. M. (2011). The science of muscle hypertrophy: making dietary protein count. Proceedings of the Nutrition Society, 70(1), 100-103.