City, screen and office: what your skin actually notices

Pollution, screens and air conditioning get blamed for city skin. Two of those are real. The third is one of the most oversold claims in skincare.

Flying and your skin: what actually happens in the cabin

Cabin air sits at 10 to 20 per cent humidity against the 40 to 60 you are used to. What that does to your skin, and why the hydrating serum in your bag can make it worse.

Altitude, snow and cold: what actually happens to your skin outdoors

UV rises about ten per cent per 1,000 metres and fresh snow reflects up to eighty per cent of it. Why windburn is really sunburn, and what to do about it.

Post-workout skincare: your pores do not open (and what does happen)

Pores have no muscles and cannot open or close. What actually happens to your skin during exercise, and the three steps that follow from it.