When a handful or more of grey strands grow into your hair, you may shriek at the visible sign of ageing.

For most people, embracing all-over grey hair, which can take a while to grow out fully, can add years to your appearance.

If silver strands aren’t your favourite thing to see in the mirror, it may still seem excessive to get your hair dyed all over when only a few grey strands have popped up.

Instead of reaching for a box of dye (even if it is much more affordable than the salon), there…