WHAT IT DOES: Helps to stimulate thickening and improve skin quality, through control of pigment production, restoration of normal blood flow and proper oxygenation of the skin.

HOW IT WORKS: A highly concentrated vitamin cream is spread on the face and an ultrasound probe then moved over the skin surface, so soundwaves help transport the molecules through the skin. A seaweed-based alginate mask is then applied.

WHAT THE DOCTORS SAY: Dr Patrick Bowler, chairman of the British Association of Cosmetic Doctors, said: "The demand for non-surgical cosmetic treatments has dramatically increased over the past five to six years."

COSTS COMPARED TO BOTOX: A course of Botox can set you back by around £300, but the effects last for six to nine months. With ultrasound facials, people go for an initial batch of 10, then regular top-ups at £75 a visit.

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