HE detergent, or high-efficiency detergent, is specifically formulated for use in high-efficiency washing machines. These machines use less water and energy compared to traditional washers, so HE detergents are designed to produce fewer suds while still effectively cleaning clothes. The low-sudsing formula of HE detergent helps prevent excess foam, which can interfere with the washing process. Additionally, HE detergents are often more concentrated, meaning you need to use less product per load, making them a more efficient choice for laundry.