A short and curly observation:
It's one of the inescapable facts of life - hair thinning is the barometer of age.
Men have concocted a variety of ways to sweep their hair across a balding pate. Inevitably the result is Hitlarian.
In Singapore however I have noticed a strange phenomenon. Both hair and nails grow with greater alacrity than they do in the Antipodes. This is good news for men of advancing age, chiropodists and hairdressers.
I am not sure of the science behind this observation but is clearly not just wishful thinking on my part. Perhaps it is the change of diet or climate?
There is some scientific evidence that hair grows slightly faster in the hot months according to at least one study.
A 1991 article in the British Journal Of Dermatology explored "androgen-dependent" hair growth in bald men living in temperate climate. Androgen-dependent hair includes some scalp hair and other hair whose growth is influenced by a kind of hormone called androgens. By contrast, androgens do not affect the growth in other types of hair such as eyelashes and eyebrows.
According to Tobin, the 1991 study suggested that androgen-dependent hair growth is faster during the spring and summer months and slower during the winter months in temperate regions such the US. Althought this study was conducted in men, the results may also apply to women