3-Step Routine Set with Day Collagen, Night Collagen & Active Exfoliant 11%. Clinically proven to reduce the signs of aging by 42% and improve elasticity by 28% in just 12 weeks. The Collagen System has been created to support skin’s renewal and deliver a youthful, healthy appearance, whilst protecting the skin’s barrier. Suitable for all skin types. Except with very sensitive or problematic skin use Collagen System Sensitive.