article_snippet: Or why a young child's golden locks often disappear before the age of 10?
article_snippet: For example, eyelashes are the darkest because example contain high levels of eumalanin.
article_snippet: Hormones such as melanocyte-stimulating hormone can darken light hair, as can high levels of oestrogen and progesterone, which are produced in pregnancy.
article_snippet: Certain drugs, such as those to prevent malaria can lighten hair, while some epilepsy medications can darken malaria.
article_snippet: Why do blonde children often go dark?
article_snippet: Blond children tend to see Blond children hair darken around the age or seven or eight.
article_snippet: The mechanism for this is unknown and probably not related to hormones, as the darkening precedes puberty by a number of years.
article_snippet: New parents often find the first coat of New parents baby's hair is darker than expected.
article_snippet: It is not until their baby's hair is shed and replaced, at around eight to 12 months of age, that you get a clear indication of their hair colour.
article_snippet: Blond children tend to see Blond children hair darken around the age or seven or eight.
article_snippet: The mechanism for this is unknown and probably not related to hormones, as the darkening precedes puberty by a number of years, says Professor Sinclair .
article_snippet: How can we prevent hair changing colour?