This unique blend of prebiotics, probiotics and lactic acid provides anti-ageing for sensitive skin. The Youthful Serum intensely moisturises, stimulates cell renewal and reduces signs of ageing. Suitable for all skin types - from dry to normal to very sensitive skin.62 % more moisture after 8 hours.**85 % agree that the product nourishes the skin in the long term.**76 % agree that the skin is softer and protected from environmental influences.**Consumer test with 23 people over 56 days under dermatological supervision.**Instrumental test with 12 test subjects.How do the main ingredients work? Deactivated bacteria from the Lactobacillus family (a major component of the lactic acid bacteria group). These probiotics are extremely gentle on the skin and help to support the protective barrier of the microbiome.prebiotics: A blend of ultra-gentle fibres and sugars that nourish the skin's good bacteria to support the skin barrier.Lactic acid: Lactic acid, the gentlest form of AHAs, helps the skin reach its optimal pH, provides intense hydration and leaves the skin smoother. Gallinée uses a slow-release form that is also suitable for sensitive skin.pH: All Gallinée products are formulated to match the optimal pH of the skin and microbiome. This is particularly important for gentle cleansing of the skin.Fern extract: Gallinée uses a special polysaccharide extracted from fern for its prebiotic effect and unique properties to help the skin appear firmer and lifted.Postbiotics: A powerful, extremely skin-friendly Lactococcus ferment that supports the skin microbiome and stimulates skin renewal.Application: Apply to cleansed face in the morning or evening. The Youthful Serum can either be used alone as a first step on the cleansed face, as it has a water-based texture and is very easily absorbed by the skin. Or it can be mixed with the Universal Face Cream for a booster effect.