From the Number 1 Dermatologist Recommended Skincare Brand in the UK, the La Roche Posay Hydraphase Intense Hydrating Serum (30ml) is a serum which enhances the skin’s capacity to infuse and retain water for optimal hydration. Infused with La Roche Posay’s legendary Thermal Spring Water, this product is a staple of the La Roche Posay collection. Buy on Amazon.