"Unique nutritional requirements" means that each person or living thing needs specific types and amounts of food or nutrients that are different from others. Full definition
We also carry a full line of prescription diets for animals with unique nutritional requirements. (signalmtnvet.com)
People have unique nutritional requirements at different stages of the life course, from conception to infancy, through childhood and adolescence, during adulthood, and into old age. (who.int)
Each puppy has its own unique nutritional requirements. (dogs.lovetoknow.com)