The Efficacy Evaluation of TCI604 Probiotic on Intestinal Function Improvement

Inclusion Criteria: * Male or non-pregnant female subjects aged 18 to 65 who are willing to sign the informed consent form; * Diagnosed with functional constipation as assessed by a physician; * Non-pregnant females who agree to use physical contraceptive methods during the study period (e.g., condoms, intrauterine devices); * No history of organ transplantation, epilepsy or seizures, liver or kidney disease, malignancy, psychiatric disorders, alcohol or drug abuse, or other major organic diseases (as determined by medical history). Exclusion Criteria: * Use of probiotics, gastrointestinal health supplements, medications, or antibiotics within 30 days prior to the study; * Presence of chronic gastrointestinal diseases (e.g., irritable bowel syndrome \[IBS\], inflammatory bowel disease \[IBD\], Crohn's disease, celiac disease, bowel control problems/fecal incontinence, pancreatitis, peptic ulcers, colorectal cancer, short bowel syndrome, ulcerative colitis); * History of gastrointestinal or major surgery; * Lactose intolerance; * Chronic diarrhea; * Pregnant or breastfeeding women; * Known allergy to any components of the study product.