ARK Skin Perfector Clearing Serum, £42

If excess oil is a problem and blemish breakout is taking its toll, then this bad boy banishes bacteria, clearing skin and reducing redness. I had some congestion and redness around my nose and after a week this helped clear it up. It’s calming and clearing, giving skin brightness and clarity while controlling shine. It doesn’t have that chalky texture either, unlike other oil regulators.

Available here.