WHAT IS PROTEIN MOUSSE? Got a sweet tooth? Looking for a dessert option that won't ruin your diet? Our new Protein Mousse is just for you! Protein Mousse is high in protein (27.1g), low in carbohydrates (4.1g), low in fat (3.8g) and comes in three delicious flavours. Simply mix a sachet with 75ml water and refrigerate for 2 hours. Wei