How fast is your body The speed at which hair grows

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UPDATED:

23:26 GMT, 19 March 2012

The speed at which your locks grow depends on your genetic make-up and the shape of your follicles.

If you’re of European origin, your hair grows about 1 cm a month — or 0.035 cm a day.

That’s about a sixth of the rate that grass grows during the winter months.

If you're of European origin, your hair grows about 1 cm a month - or 0.035 cm a day

If you're of European origin, your hair grows about 1 cm a month – or 0.035 cm a day

/03/19/article-2117338-123DADDA000005DC-513_468x530.jpg” width=”468″ height=”530″ alt=”Those of African descent have more spiral-shaped follicles, which tend to grow hair more slowly – 0.027 cm per day or 0.8 cm a month” class=”blkBorder” />

Those of African descent have more spiral-shaped follicles, which tend to grow hair more slowly – 0.027 cm per day or 0.8 cm a month

But unlike scalp hair, eyebrows and eyelashes automatically stop growing at 2 cm, fall out and are replaced.

In men, their beards grow at about the same speed as head hair — though for unknown reasons the rate of beard growth speeds up after the age of 40.