Pilot Study to Evaluate Immunopotentiating Effects of Immulina in Elderly Individuals

Inclusion Criteria: * Age 60 and older; * Generally otherwise healthy for age and not taking medications/supplements that could be expected to affect stress responses and/or impact immune parameters (example - systemic steroids, beta blockers, antidepressants, anti-anxiety drugs, Echinacea supplements, ginseng supplements or Spirulina supplements). Exclusion Criteria: * Inability to comprehend and speak English; * Any history of major psychological or psychiatric illness (example - dementia, psychotic disorder, acute mania, current substance abuse) that may limit participant cooperation or compromise the integrity of self-reported clinical or psychological data; * Presence of a confounding underlying systemic illness which could interfere with immunological profiles (example - severe cardiovascular, pulmonary, hepatic, gastrointestinal, renal, neurological, musculoskeletal endocrine , or metabolic systems; other gross physical impairments; or any history of significant convulsive disorder). Specifically, patients with congestive heart failure, recent viral or bacterial illness in the past 3 weeks, chronic kidney disease, thyroid disorder, autoimmune disease will be excluded.