Fortisip Compact Protein Fortisip Compact Protein is a high energy (2.4kcal/ml), high protein (18g per bottle), nutritionally complete, ready to drink, milk shake style nutritional supplement for the management of disease related malnutrition. It is designed to supplement the diet of patients unable to meet their nutritional requirements from other foods. Fortisip Compact Protein Starter Pack contains one 125ml bottle of each flavour: vanilla, strawberry, banana, mocha, berries & peach-mango. Fortisip Compact Protein is best served chilled. Shake well before opening. The recommended dose is 1-2 bottles per day, unless specified by a clinician or dietitian. Fortisip Compact Protein is gluten free.