Effects of consumption of the test food on the cognitive function in healthy Japanese subjects

INTERVENTION: Duration: 12 weeks Test food: Capsule containing seaweed extract (derived from Monostroma nitidum) Administration: Take one capsule of the test food per day * Daily dose should be taken within the day. If you forget to take the test food, take it as soon as you remember within the day. Do not take more than the daily dose of the test food. Duration: 12 weeks Test food: Placebo capsule Administration: Take one capsule of the test food per day * Daily dose should be taken within the day. If you forget to take the test food, take it as soon as you remember within the day. Do not take more than the daily dose of the test food. CONDITION: Healthy Japanese subjects PRIMARY OUTCOME: Neurocognition index (NCI) SECONDARY OUTCOME: The standardized scores of each cognitive function item (composite memory, verbal memory, visual memory, psychomotor speed, reaction time, comple Xattention, cognitive flexibility, processing speed, executive function, social acuity, reasoning, working memory, sustained attention, simple attention and motor speed), vessel measurement (blood flow velocity, visibility of vessels, density of vessels, diameter of vessels, distance between vessels, length of vessels, and shape of vessels), and intestinal flora (Bifidobacterium, Lactobacillales order, Bacteroides, Prevotella, Clostridium cluster IV, Clostridium cluster IX, Clostridium cluster XI, Clostridium subcluster XIVa, Clostridium cluster XVIII) INCLUSION CRITERIA: