It may be a little distressing to notice, possibly for the first time, that you have thinning hair. For many of us, it’s a natural part of aging that doesn’t necessarily need to be treated. But aging is only one of many factors that can cause or exacerbate thinning hair—and some of these causes should be addressed.

Once you know what’s causing the issue, it becomes a lot easier to figure out how to manage it. Below, SELF talked to several experts about ways to make your hair feel thicker and look shinier, as well as ways to prevent more hair thinning.