Clears slavery to another person or thing. 1.     This body/person is a slave to someone?  How many people?  Identify?2.     This body/person is a slave to something?  How many things?  Identify? Horsetail Said to be a diuretic and astringent, Horsetail has been used to strengthen the bladder, to eliminate water, and to build the immune system.  It is reputed to build elasticity in bones, hair, skin, nails and teeth, and has been used to repair fractured bones more quickly.