Methylisothiazolinone, Phenoxyethanol, Triclosan, BHT… and of course, Parabens! There is no shortage of “controversial” cosmetic ingredients, which are sometimes (but not always) pointed out with arguments that deserve our attention. So which ones should be taken seriously? Which ones should we keep a particularly vigilant eye on? For instance on the 25 following ones… which it may even be wiser to avoid.