Like most Tide detergents, Tide Free & Gentle contains surfactants. Surfactant molecules have two parts. One is "water loving" and the other is "water hating." The water-loving (hydrophilic) part breaks the surface tension of water. The water-hating (hydrophobic) part is attracted to oil and grease in soils, loosening and removing them from fabrics.
Detergents usually contain more than one type of surfactant to remove certain types of soils and clean different types of fabrics. Other ingredients in laundry detergent can include fluorescent whitening agents (to help maintain whiteness or brightness) and enzymes (to help break down complex soils such as blood and grass).
Most detergents also contain dyes and perfumes. Tide Free & Gentle does not.
Ensuring the safety of our Tide® line of fabric care products is a responsibility that P&G takes very seriously. Before any product can appear on store shelves, it must be demonstrated safe to use as intended. But that is only the beginning of our journey. The Earth's resources are limited and valuable, and we have an obligation to future generations to use these resources wisely.