Nature: salty, slightly warm
Actions: Tonifies kidney Yang; warms the womb.
• Kidney Yang deficiency: impotence, infertility, spermatorrhea, premature ejaculation, cold, soreness, weakness and pain in the lumbar region and knees.
• Cold womb: infertility, uterine bleeding.
• Increases female libido.
• Not for long term use.
• Contains oxides of iron, calcium, and magnesium, plus about 50% silica.
• Usually calcined.