2-minute, 5-years-younger daily skincare routine
Youn tested the routine on people with 'average' skin (not already optimal), had independent observers rate before/after photos from Instagram, and found an average perceived age reduction of approximately 5 years. The routine deliberately excludes unnecessary steps: a toner is optional, moisturizer is weather-dependent. Adding it per application cost is well under $1/day for most people. Youn's brand (unBeauty) sells a CE antioxidant serum that combines C + E, which he calls their most popular product — but he presents the routine as brand-agnostic.
Retinol converts to retinal then tretinoin on skin and activates retinoic acid receptors that upregulate filaggrin, reduce MMP-1 (collagenase), and stimulate type I procollagen synthesis. Vitamin C is required for hydroxylation of proline/lysine in collagen crosslinks. Vitamin E is a lipid-phase antioxidant that regenerates oxidized vitamin C. Together they protect baseline collagen from UV-induced degradation.
Every morning you cleanse your skin with a cleanser appropriate for your skin type. After that you want to use an antioxidant serum — antioxidants fight free radicals and oxidation which is one of the main causes of aging of our skin. Bonus if you add vitamin C and vitamin E together, that will get you actually more of a synergistic effect.

