Starter kits usually combine a cleansing step, a brightening serum, a retinol-based night treatment for dark spots, and a daytime moisturizer that includes SPF protection.
Begin slowly—often every other night—and increase frequency after 2–3 weeks if your skin tolerates it. Reduce use if you experience irritation, always follow with a moisturizer, and apply daytime SPF while using retinoids.
Daytime SPF protection is required: use a broad-spectrum SPF 30 or higher every day. Many regimens include a moisturizer with SPF 30 and advise consistent sunscreen use while using active tone-correcting treatments.
Directions vary by product, but common guidance is: apply a few drops of a brightening serum morning and night, and introduce retinol-based treatments every other night at first, increasing after 2–3 weeks if tolerated. Always follow with moisturizer and daytime SPF, and reduce frequency if irritation occurs.
Common actives include retinoids/retinol, niacinamide, vitamin C, hyaluronic acid, AHAs (glycolic acid), BHAs (salicylic acid), kojic acid, tranexamic acid (cetyl tranexamate mesylate), and ceramides.
These products are formulated for a wide range of skin types, including normal, dry, very dry, oily, combination, acne-prone, sensitive, and mature skin.