skinbetter science Even Tone Correcting Serum is a physician-developed, non-retinol brightening serum that uses a proprietary skinbetter science technology to visibly reduce hyperpigmentation, dark spots, and uneven skin tone — delivering dermatologist-grade brightening results without retinol, hydroquinone, or harsh depigmenting agents that cause irritation or rebound pigmentation.The proprietary Even Tone technology employs a multi-pathway approach to address pigmentation at multiple stages of the melanin cycle simultaneously: reducing tyrosinase activity that triggers excess melanin production, disrupting melanosome transfer to prevent pigment from reaching the skin surface, and accelerating the turnover of already-pigmented cells. Niacinamide provides additional depigmentation activity through a separate transfer-blocking mechanism while improving barrier function and skin tone uniformity. Tranexamic Acid helps calm the keratinocyte-melanocyte signaling that drives hormonally triggered and UV-induced hyperpigmentation. A comprehensive antioxidant complex including Vitamin C derivative provides photoprotective support against new UV-triggered dark spot formation.Non-retinol, non-hydroquinone — appropriate for all skin types including sensitive and rosacea-prone. Apply in the AM/PM regimen after cleansing and Alto Advanced Defense Serum. Always use daily SPF for best brightening results. Available at Beauty Riche — authorized skinbetter science retailer with same-day shipping.