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Retinol mechanisms: Increases cell turnover (sheds dead skin cells faster) Stimulates collagen production in dermis Reduces breakdown of existing collagen Unclogs pores and reduces acne Fades hyperpigmentation and sun damage Thickens epidermis over time Timeline for results: 4-6 weeks: Smoother texture, reduced breakouts 8-12 weeks: Visible reduction in fine lines 6-12 months: Significant improvement in wrinkles, firmness, tone Trade-off: Retinol can cause irritation, dryness, redness, and peeling, especially when starting or using high concentrations

When NAD+ levels are adequate, SIRT1 activity increases, promoting DNA repair, reducing inflammation, and enhancing stress resistance

Manalo, A

In research settings, peptides can help scientists investigate areas such as molecular signalling, cellular responses, and biochemical pathways