Could a daily probiotic boost your immune defenses?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. At the time of screening, 19 or 75 years 2. A person with a peripheral blood leukocyte level measured in Visit 1, 3x10\^3 cells/μl or more, 8x10\^3 cells/μl 3. Those who are more than one of the following standards * Those who had more than twice within one year of visiting 1 year. * {Common cold, acute tonsillitis, acute pharyngitis, acute laryngitis, acute rhinitis, etc. * Those who have stomatitis more than twice within 1 year of visit * Those who had Herpes Zoster infection within 1 year of visit 4. Those with a stress awareness scale (PSS) 16 or more 5. A person who agrees to participate in this human application test before the start of the human test and writes a written consent form Exclusion Criteria: 1. Those who are currently treating drugs due to underlying disease, etc. 2. Hypertension patients (systolic blood pressure 140 mmHg or higher or dichotomous blood pressure 90 mmHg or higher, human application test target 10 minutes stabilized) 3. Patients with diabetes with an fasting blood sugar at least 126 mg/dL or administering urine disease (oral blood sugar, insulin, etc.) 4. Those who are 0.1 UIU/mL or less, or 10 UIU/mL or more 5. Those who have vaccinated vaccines (influenza, corona, shingles that can affect immunity) within 3 months of visiting 1 6. A disease that can affect immune responses such as adult -like and rhinitis 7. AST (GOT) or ALT (GPT) is three times more than the normal upper limit of the embodiment 8. Those who are 1.5 times more than the normal upper limit of Creatinine 9. Those who administered steroids, antibiotics, immunosuppressants, and gastric acid inhibitors within 1 month of visit. 10. Visit 1 person who consumes vitamins, health functional foods that can affect immunity within 2 weeks of visiting 11. A person who has administered or consumed lactic acid bacteria products (4 or more times a week) within 2 weeks of visiting within 2 weeks of visit. 12. Those who complain of severe gastrointestinal symptoms such as heartburn and indigestion 13. Those who are pregnant or have a planning plan for lactation or this human application period 14. Those who have participated in other interventional clinical trials (including human application test) within 8 weeks of visit, or plan to participate in other interventional clinical trials (including human application tests) after the beginning of this human application test 15. Those who are sensitive or allergic to food ingredients for this human application 16. Those who have a BMI (body mass index) of 30 kg/m2 or more 17. A person who consumed alcohol within 1 month (30 days) based on 1 visit (man\> 210 g/week, woman\> 140 g/week) 18. Those who judge that the test person is inadequate for other reasons