Skin signal

Dark Spots

Pigmentation, sun marks, post-acne traces

Hyperpigmentation shows up as uneven patches — from sun exposure, post-inflammatory marks, or hormonal shifts. MIRU tracks their contrast and spread over time, so you can see fading before the mirror catches it.

What dermatologists assess

Contrast between spot and surrounding skin tone

Size and border definition of pigmented areas

Distribution pattern (clustered vs scattered)

Whether marks are superficial (epidermal) or deeper (dermal)

Top actives for dark spots

Vitamin C (L-Ascorbic Acid)

Inhibits melanin production and brightens existing marks.

10-20% concentration, pH < 3.5 for stability

Niacinamide

Reduces melanin transfer to skin cells, evens tone over weeks.

5% is the sweet spot — higher concentrations add little benefit

Alpha Arbutin

Gentle tyrosinase inhibitor that fades spots without irritation.

2% works well layered under sunscreen

Tranexamic Acid

Reduces excess melanin activity, particularly effective on melasma.

Topical 3-5% or oral (prescription)

SPF 30+

UV is the primary trigger — no brightening active works without daily sun protection.

Non-negotiable with any depigmenting routine

This reflects standard dermatological guidance — educational, not a personal assessment. For persistent or changing concerns, a dermatologist is best placed to help.