A Study on the Effects of A2 Milk on Gut Beneficial Bacteria Growth and Digestion Improvement

Inclusion Criteria: * Between 19 to 65 years of age * Participants who are experiencing digestive symptoms abdominal bloating, abdominal pain, borborygmus, fecal urgency, flatulence, diarrhea, nausea) following milk consumption on Visit 1 with a total score on the digestive discomfort symptom survey being 7 point or more for the following 5 items: abdominal pain, borborygmus , flatulence, diarrhea, nausea. (Individuals who have indicated scored 7 or more on any one item in the symptom will be excluded) * Those who have agreed to participate and given written consent through the Informed Consent Form prior to the study Exclusion Criteria: * Currently undergoing treatment for severe cardiovascular, immune, respiratory, gastrointestinal/hepatic and biliary, renal an durinary, neurological, musculoskeletal, mental, infectious, metabolic diseases, and malignancies * Diagnosed with or has a history of gastrointestinal diseases (irritable bowel syndrome, colitis, ulcerative colitis, abdominal diseases etc.), or has undergone gastrointestinal surgery * History of bowel obstruction * Hospitalized within the last 3 months of Visit 1 * Has taken the following drugs or foods within 3 months of visit 1 ① Drugs that affect body weight {obesity drugs (appetite suppressants, fat absorption inhibitors, Glucagon-like peptide-1 (GLP-1) recept or agonists etc.) etc.), diabetes drugs, etc.} ② Psychiatric drugs such as antidepressants and antipsychotics ③ Diuretics ④ Systemic steroid preparations and hormonal preparations (including oral contraceptives and thyroid hormone preparations * Has taken immunosuppressive drugs or anti inflammatory drugs within the last month (30 days) of Visit 1 * Administered systemic antibiotics, systemic antibacterial agents, colonics, bowel cleansers, probiotics, prebiotics, antioxidant related health functional foods (Coenzyme Q10, red ginseng, etc.), and glutathione containing products within 2 weeks of visit 1 (however, vitamin preparations can be used together if taken without changing dosage or medication for more than 3 months * Has taken prokinetics (Serotonin type 4 (5-HT4) Agonist, D2 Antagonists, Cholinergic Agonists etc.), laxatives {fiber supplements (Psyllium, Methylce llulose etc.), stool softeners, osmotic laxatives (Sorbitol, Lactulose etc.), stimulant laxatives (Bisacodyl , Anthraquinone etc.)} within 1 week of visit 1 * History of alcohol abuse or who chronically consume alcohol\* \* Drinking alcohol equivalent to an average of 40 g or more per day (280 g/week) for men and more than 20 g of alcohol per day (140 g/we ek) for women. * Pregnant, breastfeeding, or planning to become pregnant during the study period * Participated in another interventional clinical trial (including human trials) within the last 3 months of Visit 1, or planning to participate in another interventional clinical trial (including human trials) after the start of this study * Allergic to dairy products (bloody stool, muscle/joint pain, headache, dizziness, coma, short term memory impairment, oral ulcer, cardiac arrhythmia, sore throat, increased frequency of urination, acne, depression) * Individuals deemed inappropriate for the study by the investigator