Apparatus for stimulating hair growth and/or preventing hair loss

A device for simultaneous stimulation of a scalp and direct ion-deposition into skin thereof, the device comprising:

• a. a wheel-array comprising a plurality of wheels that each have a thickness of at most 0.2 mm, the wheels of the wheel-array being parallel to each other and spaced apart from each other, at a spacing of at least 1 mm and at most 5 mm, along a common axis;
• b. an array of stimulating elements disposed along a respective circumference of each wheel of the wheel-array, each stimulating element comprising or being coated by a metal, each stimulating element being adapted to pierce said skin of said scalp no deeper than a thickness of a dermis;
• and
• c. an electrical power source, said stimulating elements coupled to the electrical power source, wherein the wheels of said wheel-array are adapted to roll over said scalp to drive said piercing by said stimulating elements such that:
• i. upon piercing contact between the stimulating elements and the skin and simultaneously therewith, the electrical power source causes the stimulating elements that are in said piercing contact with the skin to release ions of the metal directly into the skin of the scalp;
• and
• ii. the directly-released ions are supplied by the metal of the stimulating element or of the coating thereof so as to consume the stimulating element or the coating thereof.