The barrier paradox in Indian oily skin
Subjects with oily skin produce 3× more surface sebum but have significantly lower ceramide-1 (linoleic acid-dominant) and ceramide-3 in the stratum corneum. This means that while the skin looks "oily" and "moisturised," transepidermal water loss (TEWL) is elevated — the skin is simultaneously oily and dehydrated. Applying oil-based moisturisers worsens oiliness without addressing the intracellular ceramide deficit.