A study for evaluating the effects of oral intake of food originated from a microorganism on fatigue and immune functions. A randomized, double-blind, placebo- controlled trial

INTERVENTION: Food originated from a microorganism, 1 portion of food per day for 14 days. Placebo food, 1 portion of food per day for 14 days. CONDITION: Healthy subjects PRIMARY OUTCOME: Fatigue and stress indices (subjective indices) SECONDARY OUTCOME: Fatigue and stress indices (objective indices), immune indices (subjective indices) INCLUSION CRITERIA: 1)Healthy individuals aged more than 18 years old, when giving the informed consent. 2)Individuals who are received enough explanation of the purpose and the details of this study, who decided to attend this study with their own will, who have ability of agreement, and who submitted the informed consents in writing.