Insulin is a peptide, for example
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16 and Note 1 (included as a separate PDF file)
Other anti aging factors, collagen, DNA repair micronutrient formulations can be combined with Glutathione to improve general vitality, aging, boost the immunity and to eliminate the stored toxins in the organs, enhancing the cellular function, regeneration, energy production and thus helping in the reversal of aging
Both peptides have documented immunomodulatory activity: Epitalon pineal-immune axis: melatonin is a potent immunomodulator, and melatonin restoration in aged animals is associated with improved NK cell cytotoxicity, T-cell proliferative responses, and reduced pro-inflammatory cytokine baseline (TNF-, IL-6)