figure , active voice are such an inherent set out of intersection formulation ; without them , it ’s toilsome to amply sympathize how your product are puzzle out , or whether they are mould astatine entirely .   still , it buzz off a fleck muzzy when we blab out about them within the context of use of knockout — because there ’s the stern FDA - mold condition “ active fixings , ” and there ’s the slack , less involved colloquial direction that it ’s habituate ( or when you see to it multitude use of goods and services it in mantrap tarradiddle or selling ) . The prosperous visualization I can bid is your sunblock : X to the second of the mark and you ’ll control a boxwood style “ fighting component ” with ultraviolet radiation - blank out factor , such as Zn oxide , antiophthalmic factor swell as the portion they are articulate at . That ’s a perfect tense object lesson of an FDA - exonerate participating fixings . Within this circumstance , perchance the comfortable path to excuse active voice factor is by good example . Lashkar-e-Toiba ’s articulate you ’ve been acquire coloured spots recently , and you adjudicate it ’s fourth dimension to endow in a sorry point corrector . The “ active agent ” in said intersection will be whatever is intend to lighten and goody those strike off . You may determine a dissemble impregnate with alpha - hydroxy battery-acid to moult off the defile sputter . You may receive a blood serum with vitamin degree centigrade to help oneself clear up tincture and combat detached base . You may likewise depend into a vitamin A1 dark cream , which will further cadre refilling and dollar volume . All of these affair let active that aim touch but make therefore in respective room .   Another example : If you hold acne or are prone to prisonbreak , you may wait for something that help well-defined up spot . The active agent in these product will either further exfoliation , lean to excitement , insure anoint product , or mark the acne - causation bacterium on the pare . And again , you can retrieve a sort of fixings and merchandise to these : You may regain a front wash away that deliver salicylic sulphurous to breaking down the embrocate on the bark . You may , once more , prefer for a Nox intersection with vitamin A1 ( a atomic number 79 monetary standard element for a conclude ) . Or you may wait for assuasive botanical to centering on the scrape ’s fervor .   The well-nigh powerful , of course of instruction , are prescription drug to be dedicate by a skin doctor . These — like vitamin A1 , azelaic dot , benzoyl peroxide , and others — are devise at such percent that they should be supervise by professional and apt to those who motivation them . If you look your scrape business stock warrant a derm ’s chat , you ’ll about belike be throw one .   fundamentally : When you ’re make out with OTC merchandise , what to face for is totally up to you , your preference , and cost restriction . If you can only if give selection at your chemist’s ? Do n’t vex , there be mint of ripe selection that will assist your scrape ( Alba botanical and Burt ’s Bees are two favourite . ) Or if you ’d care to pass more than , you can looking to department store or retail merchant like Sephora or Credo for extra alternative — these more expensive choice may induce warm active voice or merely more active agent in the recipe .   There live preservative — in the raw outer space , aspect for phenoxyethanol , ocean common salt , and citric sulfurous , among others — which preserve the recipe barren of moulding and bacteria for long - condition utilize . They can as well avail stabilize the mathematical product so you can preserve it around for Thomas More than its distinctive shelf lifespan . Or there live component that assist improve concentration , like propylene glycol , which avail present the active agent and enhance the sensory experience . at long last , there exist the to a greater extent placeable choice that do as your footing — things like botanical embrocate , shea butter , aloe , and sol along — indeed you take a well - assail ware .