Adjuvants, Immunologic/pharmacology; Killer Cells, Natural/drug effects; Leukemia, Erythroblastic, Acute/drug therapy; Lipoproteins/pharmacology; Lymphocyte Activation/drug effects; Plant Extracts/pharmacology; Spirulina/chemistry; Adjuvants, Immunologic/therapeutic use; Adult; Aged; Antineoplastic Agents, Phytogenic/pharmacology; Antineoplastic Agents, Phytogenic/therapeutic use; Biomarkers/metabolism; Cell Line, Tumor; Cross-Over Studies; Dietary Supplements; Dose-Response Relationship, Drug; Double-Blind Method; Female; Humans; Leukocytes, Mononuclear/drug effects; Lipoproteins/therapeutic use; Male; Middle Aged; NK Cell Lectin-Like Receptor Subfamily K/genetics; NK Cell Lectin-Like Receptor Subfamily K/metabolism; Perforin/genetics; Perforin/metabolism; Phytotherapy; Pilot Projects; Plant Extracts/therapeutic use; RNA, Messenger/metabolism; Reference Values; T-Lymphocytes; Young Adult