Uneven tone has a mechanism, and a method.
Research suggests hyperpigmentation occurs when melanocytes produce excess melanin in response to sun exposure, inflammation or hormones, and that pigment is then deposited unevenly in the skin. Studies indicate that because ultraviolet light is a primary trigger, sun protection is central to both fading existing marks and preventing new ones.
Pigment is made by melanocytes, cells that package melanin and hand it off to surrounding keratinocytes. Research suggests that when these cells are overstimulated, by ultraviolet light, by inflammation, or by hormonal signals, they produce and transfer more melanin than the skin clears. Where that extra pigment settles determines how it looks: higher in the skin it reads as brown, deeper down it can appear gray or blue and tends to be more stubborn.
Clinically this manifests as several patterns that share one biology. Studies describe sunspots from cumulative exposure, melasma that often tracks with hormonal change, and post-inflammatory hyperpigmentation that follows acne, injury or irritation. The last pattern is especially relevant in deeper skin tones, where research suggests melanocytes respond more readily to inflammation, so marks can be darker and linger longer.
The research consensus favors a layered approach. Reviews report that tyrosinase inhibitors and melanin-transfer blockers can measurably reduce pigmentation, that consistent broad-spectrum sun protection is non-negotiable because ultraviolet undoes progress, and that gentle handling matters because fresh inflammation simply creates new pigment. Fading is gradual by nature, and combination approaches tend to outperform any single ingredient.
Skin DNA is Skinlumis's proprietary archetype framework. It is not a genetic test.
Research suggests fading is gradual and depends on how deep the pigment sits. Surface marks may improve over weeks to a few months with consistent care; deeper or hormonal pigment often takes longer and can recur without sun protection.
Ultraviolet light is a primary trigger for melanin production. Studies indicate that without daily broad-spectrum protection, sun exposure can darken existing spots and undo the progress of brightening ingredients.
That is post-inflammatory hyperpigmentation. Research suggests inflammation from acne stimulates extra melanin as the skin heals, a response that is often stronger and longer-lasting in deeper skin tones.
Build your Skinlumis record and see how the research on this concern maps to your own skin, archetype and protocol.