Many variables will contribute to visible results from using Brightening Serum, such as pigment depth, pigment source, if the source has been managed or eliminated, how long the pigment has been present, consistency of regimen, and diligent SPF use. For best results, it is imperative that a full regimen is followed from cleansing, complex use, hydration, and diligent SPF usage. Resistant skin with long term pigment should expect to see fading around 90 days. Minor or recently developed pigment may see a result within 30-60 days. When pigment diminishes, the skin care regimen can be modified, but must be maintained.