Yes, casein protein powder can be good for weight loss as it can help in building and preserving lean muscle mass while promoting a feeling of fullness, leading to reduced calorie intake. Casein is a slow-digesting protein and releases amino acids into the bloodstream gradually, which can help to sustain muscle mass and prevent muscle breakdown during weight loss. Additionally, casein protein has been shown to have a higher thermic effect compared to other protein sources, meaning that the body burns more calories digesting it. This can help support weight loss goals.