Most women know that the right haircut and colour can take years off your appearance, but few spend time worrying about how their parting is ageing their face.
However, according to celebrity hair-stylist Andrew Barton, the wrong parting can make us look years older - dragging down features - while the right parting can be almost as rejuvenating as a visit to a plastic surgeon.
CENTRE PARTING: ADDS SEVEN YEARS
HOW TO DO IT: It's easiest to get a clean parting on damp hair. Take the sharp end of a tail comb and, starting at your hairline, guide the point of the comb straight through the centre of your head, using the teeth to smooth down the sides as you go.
VERDICT: I had hoped that this look would be chic and sleek, but sadly, I look old and severe. This is a classic look. It's elegant, but on you it is a little ageing as it drags the face downwards.
THE ZIG-ZAG: TAKES OFF TWO YEARS
HOW TO DO IT: This one is a little trickier. First, create your classic centre parting as before, then, with the tail of your comb, lift a section of hair to the left of your parting and flick it over to the right, smoothing with your comb.
Do the same on the right side and then repeat until you reach the crown of your head.
VERDICT: The slightly messy look will soften your features, making you look younger. And a jagged parting will make hair look thicker.
PARTING ON RIGHT: TAKES OFF FIVE YEARS
HOW TO DO IT: My right eye is noticeably bigger and wider than my left, so parting my hair on the right should be flattering as it will bring attention to this eye.
VERDICT: I love it! Having your hair sweeping from right to left emphasises your wider eye, and wider eyes give your face the appearance of youth.
LEFT SIDE PARTING: ADDS FIVE YEARS
HOW TO DO IT: This time we use the thin outer edge of my eyebrow as a guide. Starting from that point we run the tail of the comb neatly from the front to the back of my head, smoothing the sides down as we go.
VERDICT: It looks like a comb-over gone wrong and it's much too trendy. When I look in the mirror, my attention's drawn straight to the edge of my crow's feet. Not a good look.
SLIGHTLY OFF CENTRE: TAKES OFF FOUR YEARS
HOW TO DO IT: Find the perfect position for an off-centre parting is to trace a line up from the inner edge of my right eye and then part my hair directly in alignment with that point.
VERDICT: The Duchess of Cambridge often has her hair parted in a similar fashion. The difference an inch makes is amazing. It's surprisingly flattering, softening my face and distracting from my wobbly jawline, which makes me look younger.