ISDIN Isdinceutics Flavo C Melatonin 30 Ampules-Night Repair Serum. Serum for the face that comes in ampoules and works while you sleep to boost the skin's antioxidant defenses. During the day, it is made. Bakuchiol is a natural ingredient that has anti-aging properties and gives the skin back its elasticity and tone. Vitamin C helps fight oxidative stress and makes the skin look brighter.