Has your hair lost its luster? Blame your age. Truth is, after 30, hormonal ups and downs and everyday wear-and-tear can do a number on your locks, leaving them coarser or thinner. As you grow older, your hair also starts to disappear where you want it moston your headand suddenly appear in places you really wish it wouldn’t (like on your chin). To protect what you’ve got and deal with what you don’t want, try this age-specific advice.