The herb in the flowers and roots contains saponins, which are substances that resemble hormones. Especially the rhizome contains resin, goma, albumin and saponin saprobin, which by hydrolysis gives gypsogenin. The leaves contain vitamins, flavonoids and vitamin C.
The scientific name Saponaria comes from the Latin word “sapo” meaning “soap”, and refers to its usefulness as a cleanser. From the same Latin root comes the name of the toxic substance saponin, which is contained in the roots of the plant up to 20% during a full flowering period.
This property of Saponia is believed to have been known to the Romans, but the wider propagation of the plant began in the Middle Ages and the Renaissance. As a curative herb, it is known from the time of Dioskourides, who called it “Strothium”, and its use seems to have involved the treatment of various forms of dermatopathy. Around 1700, Saponaria was used to treat syphilis. Traditionally it has been used for centuries to clean delicate fabrics and clothes.
In modern herbal therapy, Soap is used both internally and externally to treat skin disorders. Saponins containing the plant have strong anti-inflammatory effects, while in large doses the Saponaria acts as a powerful laxative and is slightly toxic. According to herbalists, Saponaria is effective against dermatoses, such as psoriasis, eczema and acne. Also in many writings it is reported that Saponaria increases the secretion of bile and is therefore considered one of the most effective cholecys. It is also considered a herb with expectorant, diaphoretic, diuretic and laxative properties in small doses. As a diaphoretic, it is believed to drop the fever. It is also used in many specialized shampoos as it is thought to reduce hair loss.