As you know, all skins are different and react differently to the same skincare products. Depending on this and the characteristics of the dark spots, the appearance of some may improve dramatically and the appearance of others may not change much. The effect of the Pigmentation Repair Formula tends to be gradual and may require up to 6 months for maximum effects. Continued protection from the sun is required, or the areas will probably re-darken. We would recommend you keep your skin well hydrated and exfoliated for an optimal appearance. Exfoliation and moisturizing/nurturing should be part of a daily routine for healthy-looking skin.