BOTOX An injection of Botulinum toxin A (a diluted and purified form of the toxin which causes botulism) softens and prevents frown lines. The jab, 22 years old this spring, changed the face of cosmetic surgery, with celebrities including Simon Cowell admitting to relying on it to look younger. Each year it is estimated to make its manufacturers around £800m from more than 60,000 injections.

JUVEDERM: LIP ENHANCEMENT A series of injections of Juvederm filler around the mouth can make the lips fuller and reshape ageing pouts. Juvederm contains hyaluronic acid which, by attracting water, plumps up the skin. Results last for up to a year.