“…12 After these neurotoxins cross the blood-brain barrier and reach the brain, they cause brain damage, resulting in learning difficulties, motor coordination disorders, and the onset of diseases such as Alzheimer diseases. 4,13,14 Microbial neurotoxins (botulinum, tetanus toxin, and lipopolysaccharide) are mostly produced by bacteria. These substances, which stimulate the nervous system, prevent the deliver of neurotransmitters from synaptic vesicles and block communication between neurons.…”