Make-up sliding off your face by midday? That’ll be sebum a study found that production is highest in the middle of the day. “It’s another evolutionary throwback,” explains naturopath Susan Curtis. “Our ancestors spent their time outdoors, so we developed a protective mechanism to guard against UV rays when they’re at their strongest, producing a waxy, lipid-rich layer full of natural sun protection.” But now that we use products with built-in SPF, the excess sebum simply becomes an unwelcome lunchtime sheen. Keep Palladio Rice Paper Oil-absorbing Blotting Tissues with Rice Powder (R45, Dis-Chem) at hand to mop up shine. Also, excess cortisol doesn’t help with sebum. A good way to lower it? With rosemary, which you can find in Victorian Garden Kalahari Melon and Rosemary Foaming Gel Face Cleanser (R79, Faithful-To-Nature.co.za).