Immune Benefits of Coffee

Inclusion Criteria: * Healthy, self-sufficient, free-living Chilean elderly * Having the ability to comprehend the procedures of the study * Having obtained his/her informed consent after verbal and written information Exclusion Criteria: * Subjects drinking more than 2 cups of coffee per day * Subjects with rapidly deteriorating health status at enrolment in the study * Subjects with terminal or acute disease, or unstable health status * Subjects with chronic disease: chronic respiratory illness; chronic diseases of the pulmonary or cardiovascular systems (including asthma); chronic metabolic disease (diabetes); chronic renal disease, organ failure * Subjects with serious neurological disorder, including dementia (MMSE \< 20) or Alzheimer's disease * Subjects who have experienced rapid weight loss, chronic diarrhea (loose stools, 3 times daily), or Crohn's (IBD) * Subjects with gastrointestinal problems * Subjects with a hospitalization planned during this study * Subjects who have received any antibiotic treatment during the last 3 months prior to the beginning of this study * Subjects who had a colonoscopy performed during the last 3 months prior to the beginning of this study * Subjects with immune deficiency diseases (e.g. HIV infection) * Subjects with a history of allergy - especially to egg protein, egg, shellfish or the antibiotics polymyxin or neomycin * Subjects receiving medication that may influence the immune system (i.e. corticosteroids, immuno-suppressors and immuno-modulators, antimicrobials) * Subjects who have received any vaccination during the last 15 days prior to baseline * Subjects who are expected to be non-compliant * Subjects currently participating or having participated in another clinical trial during the last 3 months prior to the beginning of this study * Subjects participating in another research study involving any type of medication related to the study