Noni Soap Benefits The Noni plant is commonly used to treat several skin conditions and problems such as eczema, acne, ringworm, and skin rashes. The plant also contains anti-bacterial and anti-fungal properties. In addition, the noni plant restores skin cells and rids the skin’s surface of unwanted components. When combined with the other moisturizing and soothing ingredients included in the product, the soap leaves the skin soft, supple, and healthy.