We all have growth factors. They repair our bodies and nurture cell turnover to improve hydration, firmness and elasticity. When we’re young we have a lot. When we get older, we have fewer - hence Cell ServiceTM ingredient technology in Master Plan. Cell ServiceTM is our signature bioactive, clinically vetted stem cell-derived growth factor and potent peptide complex that taps into skin’s ability to heal itself, boosting elasticity and firmness.