Probiotics Improve Constipation

Inclusion Criteria: * Aged 18 to 65 years (inclusive). * Diagnosed with constipation, defined as fewer than 3 spontaneous bowel movements per week and/or Bristol Stool Form Scale types 1 or 2. * Willing and able to comply with the study protocol and complete all required assessments. * Provide written informed consent prior to any study-related procedures. * Male and female participants of childbearing potential must agree to use effective contraception voluntarily from 14 days prior to screening until 6 months after the end of the trial. Female participants of non-childbearing potential (e.g., post-menopausal or surgically sterile) are exempt from this requirement. Exclusion Criteria: * Use of products with functions similar to the investigational product within a short period prior to screening that may interfere with the evaluation of study outcomes. * Intention to change dietary habits significantly during the study period. * Severe allergies or immunodeficiency. * Women who are pregnant, breastfeeding, or planning to become pregnant during the trial. * Severe diseases of vital organs (including cardiovascular, pulmonary, hepatic, or renal disease), metabolic diseases (e.g., diabetes, thyroid disorders), malignancy, or severe immune system disorders. * Use of antibiotics within the past 30 days. * Severe psychological or psychiatric disorders. * Poor compliance (e.g., failure to take the test product as instructed or failure to attend scheduled follow-up visits) that would preclude a valid assessment of efficacy. * Organic constipation (e.g., caused by structural or pathological conditions). * Irritable bowel syndrome with constipation (IBS-C). * History of surgical procedures within 30 days prior to screening that may have caused or contributed to constipation symptoms. * Intake of probiotic or prebiotic supplements within one month prior to the start of the study. * Any other condition that, in the investigator's opinion, would make the participant unsuitable for participation in the study.