Shop Wholesale Prienze Azulene Calm Ampoule (50ml). The Prienze Azulene Calm Ampoule is a highly concentrated facial serum (often branded under the manufacturer CORÉANA PREANGE or sometimes as "Pretty skin") designed to soothe and calm sensitive, irritated, or acne-prone skin. It is known for its distinctive violet color, which comes from the natural ingredient guaiazulene, an anti-inflammatory compound derived from chamomile, not artificial pigments. 

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