What is skin cycling and how does it work?

Skin cycling is a structured four-night skincare rotation popularized by dermatologist Dr. Whitney Bowe. Night one involves chemical exfoliation with an AHA or BHA, night two involves retinol, and nights three and four are recovery nights with barrier-supporting, hydrating products and no actives. This approach prevents over-exfoliation and irritation while still delivering the benefits of both exfoliants and retinoids.