Skin signal
Tone
Dark spots, 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 tone
Vitamin C (L-Ascorbic Acid)
Inhibits melanin production and brightens existing marks.
10-20% concentration, pH < 3.5 for stability
Reduces melanin transfer to skin cells, evens tone over weeks.
5% is the sweet spot — higher concentrations add little benefit
Gentle tyrosinase inhibitor that fades spots without irritation.
2% works well layered under sunscreen
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.
Recommended products
Curated picks for this signal
High-dose L-AA in a stable formula, lightweight for layering
Search Olive Young GlobalNiacinamide + snail mucin combo targets post-acne marks
Search Olive Young GlobalFerment filtrate brightens overall tone, pairs with vitamin C
Search Olive Young GlobalOpens a product search. Partner link.
Partner links can support MIRU. Recommendations remain fit-first and independent. Full disclosure.
Other signals
Pores
Visibility, congestion, and sebum balance
Redness
Sensitivity, irritation, and calming progress
Hydration
Moisture depth, plumpness, and skin comfort
Texture
Smoothness, bumps, and cell turnover clarity
Fine lines has a page here too, as knowledge rather than a reading. Read the guide →
Personal guidance, not medical advice.