Beyond Skin Comfort: Neurobiological Well-being, Receptor Signaling, and the Biological Foundations of Skin Longevity

The growing scientific interest in skin longevity has shifted attention from the correction of visible aging characteristics toward the long-term preservation of biological function. In parallel, well-being has become an increasingly prominent concept in cosmetic science, commonly associated with sensory comfort, emotional satisfaction, and stress reduction. However, the biological relationship between well-being and skin longevity remains insufficiently characterized. Human skin possesses an active neuro–immune–endocrine regulatory network involving neurotransmitters, neuropeptides, neurohormones, sensory ion channels, and their corresponding receptors. These systems participate in cutaneous sensory perception, inflammatory regulation, epidermal barrier homeostasis, tissue repair, and physiological adaptation. This scientific perspective and narrative review examines the potential relationships between well-being-associated signaling, cutaneous homeostasis, biological resilience, and skin longevity. Particular attention is given to oxytocin receptor signaling, endogenous opioid pathways, substance P, CGRP, transient receptor potential channels, endocannabinoids, serotonergic and melatoninergic systems, and cholinergic and dopaminergic regulation. The article proposes biological resilience as a potential functional bridge connecting neurobiological regulation with the sustained preservation of skin function. Within a biological state-aware perspective, receptor signaling is considered context-dependent, with its consequences influenced by cellular conditions, inflammatory states, hormonal environments, and temporal dynamics. Although experimental and human studies provide evidence linking neurobiological signaling to selected aspects of skin function, the proposed relationship between well-being and skin longevity remains to be established through longitudinal research. The article presents a conceptual research framework intended to support future mechanistic investigations, functional assessments, and the scientific evaluation of skin-longevity claims.