Midnight Blue Youth Activating Sérum

A watery ampoule from Klairs' Midnight Blue line, sold in 10, 20 and 50 mL. Guaiazulene gives it its blue colour and sits with sh-Oligopeptide-1 and sh-Polypeptide-1 (EGF and FGF, 10 ppm each), adenosine and blueberry fruit extract. Klairs frames it as a calming step applied before toner, three or four drops patted in. Fragrance-free, non-comedogenic, irritation-tested for sensitive skin.