The future of laboratory analyses would require the identification of clinical parameters involving the main integrative biological functions including neuroendocrine, immune and cardiovascular systems, and capable of predicting the evidence of metabolic alterations and the possible occurrence of systemic diseases. According to the clinical data available up to now, the status of health may be identified by the following five major biomarkers, consisting of normal circadian rhythm of cortisol and the pineal hormone melatonin, normal blood concentrations of fatty acid amide hydrolase (FAAH), whose increase is associated with an endocannabinoid system deficiency, normal lymphocyte-to-monocyte ratio (LMR) values, normal blood levels of TGF-beta, the main immunosuppressive anti-inflammatory endogenous molecule, and normal values of ANP-to-ET-1 ratio. Since the evidence of alterations involving these five parameters may predispose to the onset of more severe metabolic disorders or systemic disease, the clinical evaluation of these five biomarkers could constitute the routinary laboratory analyses for realizing a real Preventive Medicine.