An embodiment is a method of preventing, mitigating or treating neurological conditions and diseases that includes administering an effective amount of a medicament comprised of Lactobacillus bulgaricus B-30892 and/or a supernatant resulting from culturing Lactobacillus bulgaricus B-30892 and/or bioactive materials resulting from culturing Lactobacillus bulgaricus B-30892 to a human to prevent, mitigate or treat neurological conditions and diseases.