Impact of Probiotics on Children With ADHD

Inclusion Criteria: 1. Diagnosis of ADHD per DSM-5 criteria; 2. Age 6-12 years, gender-neutral; 3. IQ \>70 on intelligence testing; 4. Participant/guardian comprehension and voluntary consent. Exclusion Criteria: 1. Those with a clear history of other serious neurological diseases, such as epilepsy, head trauma, encephalitis or meningitis, etc.; 2. Have taken antibiotics, probiotics or immunosuppressants within one month before starting the experiment; 3. Ongoing special diet, such as ketogenic diet, etc 4. BMI higher than the 90th percentile or lower than the 10th percentile for children of the same age and sex; 5. Those who have had symptoms of respiratory or digestive tract infection in the past month, such as fever, cough, diarrhea, etc.; 6. Those who have had inflammatory bowel disease in the past, such as ulcerative colitis, Crohn's disease, etc.;