Sulfer is known to have wonderful benefits for the skin. According to my research Sulfer or Azufre as we call it in Spanish helps the prone acne skin control the production of sebum. Along with Grapeseed oil, Sunflower oil, Coconut oil, Olive oil, white clay, Colloidal oats, and heavy cream this bar of soap can be beneficial to those suffering from acne-prone skin. Color, Fragrance, and Design may vary. Tested on willing humans with acne-prone skin :) If an allergic reaction happens please discontinue.