Potassium Hydroxide: Potassium Hydroxide helps the saponification of oils to create soaps and detergents. But here's the best part: None of the Potassium Hydroxide is left in the product after it is saponified. Whole Naturals Castile Soap is made of high-fat carrier oils, making the lye impossible to be left behind.

Saponification is the process in which triglycerides are combined with a strong base to form fatty acid metal salts during the soap-making process. The distribution of unsaturated and saturated fatty acid determines the hardness, aroma, cleansing, lather, and moisturizing abilities of soaps.

Citric Acid: When dissolved into water and combined with potassium hydroxide to make a lye solution, citric acid becomes sodium citrate, which helps to reduce soap scum and reduces spoilage and DOS (dreaded orange spots) in finished soap products.

Tocopherol: Vitamin E (also known as tocopherol) is a nutrient that is found in every cell of your body. It helps your nerves and muscles work well, prevents blood clots, and boosts your immune system so it can fight off infections from germs.