Thick, luscious, healthy-looking hair never goes out of style. Besides being one of the most evident signs of youth, many women admit that having voluminous hair makes them feel sexier and more feminine. However, as we get older, our hair ages too and some women start noticing their hair is getting thinner, scarcer or more brittle. This is generally a totally natural process but it might also be due to external causes, such as stress, unbalanced nutrition and overdoing chemical or hot styling methods.