Hemani Horsetail Oil contains high amounts of silica useful when trying to stimulate hair growth. The herb rejuvenates your hair, adding sheen to the appearance and strength to the hair shafts. It also contains selenium and cysteine, which are known to promote healthy hair growth. Traditionally Horsetail is used for “fluid retention” (edema), kidney and bladder stones, urinary tract infections, the inability to control urination (incontinence), and general disturbances of the kidney and bladder