Pharmaceutical agents affecting peripheral nervous system made in whole or substantial part of Lactobacillus plantarum PS128; pharmaceutical preparations acting on the central nervous system made in whole or substantial part of Lactobacillus plantarum PS128; medicated candies made in whole or substantial part of Lactobacillus plantarum PS128; dietetic foods adapted for medical use made in whole or substantial part of Lactobacillus plantarum PS128; biological preparations for veterinary purposes made in whole or substantial part of Lactobacillus plantarum PS128 for the treatment of separation anxiety, aggression, compulsive disorder, excessive barking, yowl and stabilize emotional status; Preparations of microorganisms for medical or veterinary use made in whole or substantial part of Lactobacillus plantarum PS128 for the treatment of autism spectrum disorder, Parkinson's disease, Alzheimer's disease, depressive disorder, Tourette syndrome, visceral hypersensitivity, constipation, insomnia, stress, separation anxiety, aggression, compulsive disorder, excessive barking, yowl and stabilize emotional status; nutraceutical preparations for therapeutic or medical purposes made in whole or substantial part of Lactobacillus plantarum PS128 for the treatment of autism spectrum disorder, Parkinson's disease, Alzheimer's disease, depressive disorder, Tourette syndrome, visceral hypersensitivity, constipation, insomnia, and stress; milk ferments for pharmaceutical purposes made in whole or substantial part of Lactobacillus plantarum PS128; biological preparations for medical purposes made in whole or substantial part of Lactobacillus plantarum PS128 for the treatment of autism spectrum disorder, Parkinson's disease, Alzheimer's disease, depressive disorder, Tourette syndrome, visceral hypersensitivity, constipation, insomnia, and stress; powdered whey proteins being nutritional supplements made in whole or substantial part of Lactobacillus plantarum PS128.