Fortijuce Strawberry (4x200ml). Fortijuce is a high energy (1.5kcal/ml), ready to drink, juice style nutritional supplement for the dietary management of disease related malnutrition.. Fortijuce can be used to supplement the diet of patients unable to meet their nutritional requirements from other foods and for those who do not like, or tire of milk tasting supplements. Fortijuce is fat free and is suitable for patients on a low fat diet.