Can Casein Protein Powder cause constipation?

Constipation is unlikely with casein protein powder alone, but more often is due to excessive use of protein supplements without sufficient fiber or hydration. As casein is very slow to digest, it is unlikely to case constipation. However, if you do suffer from constipation after using casein protein powder you should ensure you are taking enough fresh fruits and vegetables and drinking enough fluids. If problems persist you should consider reducing your daily protein intake.