Rene Furterer hairdressing products. TONUCIA redensifying serum. Redensifying invigorating serum. It contains Melissa extract, which is an antioxidant and delays the breakdown of collagen, orange essential oil has soothing properties and is effective due to its stimulating effect on microcirculation and its purifying properties, and lavender essential oil, which has antiseptic and relaxing properties. Leaves hair visibly denser and restores the function of a younger scalp.