Research Notes
An analysis of melanin dynamics, post-inflammatory hyperpigmentation (PIH), and why Western formulations fall short under Indian solar indices.
Indian skin tones can be particularly prone to persistent pigmentation concerns. Daily sun protection should therefore consider strong UVB and long-wave UVA coverage, while visible-light protection may require additional formulation strategies.
Q: Why does Indian skin need different sun protection compared to Caucasian skin?
A: Indian skin possesses higher baseline melanin (Fitzpatrick phototypes III-V) which naturally protects against immediate sunburn but makes the skin highly prone to Post-Inflammatory Hyperpigmentation (PIH) and melasma. SPF primarily measures protection against UVB-related erythema and does not fully describe UVA protection.
Darker skin tones have an abundance of active eumelanin. While this baseline melanin provides natural protection corresponding to a mild SPF of 3 to 4, it presents a unique cellular challenge: a highly reactive pigment-producing apparatus.
Ultraviolet exposure, particularly long-wave UVA, can contribute to melanogenesis and persistent pigmentation.
Does higher SPF protect against hyperpigmentation better?
No. SPF only measures UVB protection (burning). To prevent hyperpigmentation, you must look for high UVA protection (represented by PA rating) and broad-spectrum defense.