LEVEL 5
Skin Longevity Care
To quantify Skin Longevity through data rather than intuition, we propose the Skin Longevity Index (SLI), a composite index of 5 parameters.
Barrier Function Score (TEWL + stratum corneum moisture) -- Weight: 25%. Measures transepidermal water loss and stratum corneum moisture retention to quantify barrier integrity.
Inflammation Score (skin surface IL-1a / redness measurement) -- Weight: 20%. Quantifies inflammatory cytokine levels and micro-redness imperceptible to the naked eye.
Elasticity Score (Cutometer R2/R0 values) -- Weight: 20%. Measures skin viscoelasticity to evaluate the integrity of the collagen-elastin network.
Oxidative Stress Score (sebum peroxide measurement) -- Weight: 15%. Evaluates the degree of accumulated oxidative damage.
Microbiome Diversity (Shannon index) -- Weight: 20%. Evaluates the diversity and health of the commensal microbiota. Higher diversity indicates greater resilience to external stimuli.
Measure SLI regularly and track changes over time. Bringing the age-correlated SLI decline rate close to zero -- the smaller the annual rate of decline, the better Skin Longevity is being achieved. What matters is not the absolute value, but the velocity of change.
Based on each SLI parameter score, design an individually optimized care protocol. Those with low barrier function scores should prioritize the ceramide trio (ceramides, cholesterol, fatty acids). Those with high inflammation scores should focus on niacinamide 4-5% and fermented ingredients. Those with rapid elasticity decline should prioritize multi-peptide formulations.
SLI Measurement -> AI Analysis -> Protocol Adjustment -> Care Execution -> Re-measurement. By continuously running this feedback loop, care precision improves over time. Not "it should work if I keep using it," but "measure, confirm improvement, and keep optimizing" -- the era of data-driven skincare has begun.
KAIAN develops skincare products based on scientific evidence.
Feel free to ask questions about ingredients and formulations.
