Skin Resilience and Biological Adaptability: Current Clinical Evidence on Micronutrients and Bioactive Compounds

Skin resilience and biological adaptability describe the capacity of cutaneous tissue to preserve structural integrity and functional stability under intrinsic aging and environmental stress. Rather than introducing a novel biological pathway, this framework integrates established domains, including redox homeostasis, extracellular matrix maintenance, inflammatory regulation, and barrier function, into a measurable construct. Micronutrients and bioactive compounds participate in these processes; however, the strength and clinical relevance of current evidence require critical evaluation. This structured narrative review appraises mechanistic and clinical studies published between 2000 and 2025 investigating nutritional modulation of measurable skin parameters. Electronic database searches (PubMed/MEDLINE, Scopus, Web of Science) were conducted using predefined terms related to skin aging, resilience-related endpoints, and micronutrient interventions. Controlled human trials were prioritized, and mechanistic findings were distinguished from clinical outcomes. Current clinical evidence most consistently supports a role for carotenoids and antioxidant vitamins in enhancing cutaneous redox stability and short-term photoprotection. Collagen-based formulations and selected polyphenols demonstrate modest improvements in elasticity, hydration, and wrinkle-related parameters, though many trials are limited by small sample sizes, short duration, and heterogeneous endpoints. Overall, micronutrients appear to function primarily as modulators of adaptive capacity rather than as primary drivers of structural rejuvenation. Larger, longer-term randomized trials employing standardized resilience-related endpoints are needed to clarify the magnitude and durability of clinically meaningful effects.