Isdin Isdinceutics Flavo-C Melatonin Night Recovery Serum-in-oil texture ideal for nighttime use Flavo-C Melatonin features an innovative Serum-in-oil texture, a balanced blend of light, non-greasy, gradually absorbed clear oils. It's a perfect texture for nighttime use as it's highly nourishing and hydrating. It allows for a very pleasant massage into the skin, giving a soft, silky finish.