They break Celleral down collagen and elastin that help keep skin firm. What are free radicals? They are oxygen molecules that form in your system and only have one electron instead Celleral of two. UV damage from the sun (as well as other environmental toxins and pollutants) Celleral cause free radicals to form. These damaged oxygen molecules then begin to fight healthy molecules in your body to try and "steal" the that second needed Celleral electron.