This study was conducted to investigate the efficacy and safety of SGF200 on immune enhancement.

This study was a 8 weeks, randomized, double-blind, placebo-controlled human trial. 100 subjects were randomly divided into SGF200 group or placebo group. The investigators measured Natural Killer cell activity, Cytokines(IL-2, IL-12, IFN-γ, TNF-α), questionnaire scores of upper airway infection.

Inclusion Criteria:

• Adult men and women over 50 years
• After fully hearing and fully understanding this clinical trials, those who agree to voluntarily decide to participate and to comply with the notice

Exclusion Criteria:

• If screening shows that the white blood cell(WBC) is less than 3000/㎕ or more than 8000/㎕

• Those who received influenza vaccination within 3 months before first intake for test product

• Those who have a body mass index(BMI) of less than 18.5 kg / m^2 or greater than 35 kg / m^2 at the screening

• Those who have a clinically significant acute or chronic cardiovascular system, endocrine system, immune system, respiratory system, liver biliary system, kidney and urinary system, neuropsychiatry, musculoskeletal system, inflammatory and hematologic

• Those who take a medication or health function food that affects your promotion of immunity within 1 month prior to the screening

• Those who have received antipsychotic medication within 3 months before screening

• Those who alcoholic or drug abuse suspected

• Those who participated in other clinical trials within 3 months before screening

• Laboratory test by show the following results

  • Aspartate Transaminase(AST), Alanine Transaminase(ALT) > Reference range 3 times upper limit
  • Serum Creatinine > 2.0 mg/dL

• Pregnancy or breast feeding

• Those who doesn't accept the implementation of appropriate contraception of a childbearing woman

• Principal Investigator judged inappropriate for participation in study because of Laboratory test result, etc.