The number on the bottle answers only part of the question
Patients often tell me they wear SPF 50 every day and cannot understand why their pigmentation persists. The explanation is usually not compliance. It is that SPF describes protection against ultraviolet B radiation, and melasma in Asian skin is also driven by visible light, the ordinary light you can see, which passes through most clear sunscreens almost unimpeded.
What visible light does to pigment-prone skin
Research over the past decade has shown that visible light, particularly the high-energy blue-violet portion, stimulates melanogenesis in darker skin types and produces pigmentation that is more sustained than that induced by ultraviolet A alone. Lighter skin is comparatively unaffected, which is one reason this finding took so long to reach everyday practice: much of the earlier research simply did not include the skin types we treat every day in Penang.
Why tint is not a cosmetic detail
Iron oxides, the pigments that make a sunscreen tinted, are currently the most practical way to attenuate visible light on skin. This is why I ask melasma patients to use a tinted formulation rather than a clear one, and why "invisible" sunscreens, however elegant, are the wrong tool for this specific job. The tint is the active protection, not the packaging.
The honest limits of any bottle
No sunscreen makes tropical daylight harmless. Screens and indoor lighting contribute far less than the sun, but a lunchtime walk without shade contributes a great deal. Photoprotection in Malaysia realistically means a tinted broad-spectrum sunscreen applied properly in the morning, reapplied around the middle of the day, and supported by shade, hats and sensible timing.
Where this fits in a pigmentation plan
Photoprotection is not the boring preliminary to the real treatment. It is roughly half of the treatment. Any clinic protocol, whether a regulated depigmentation programme or a gentle laser series, is competing directly against daily light exposure. Patients who accept this reach their goal faster and hold it longer, and I would rather say so plainly than let anyone believe a device alone will settle the matter.
This article is educational and does not replace a medical consultation. Suitability for any treatment is determined by a doctor at consultation.