Numerous different factors can trigger hair loss. Yet, most triggers commonly fall into the following four categories: genetics, autoimmune conditions, diet, and inflammation. In some cases (like your genetics), there is not much you can do to avoid hair loss.
However, when it comes to a trigger like your diet, you usually can make changes to minimize or correct hair loss. Knowing what is causing your hair loss can help you take proactive steps to keep as much hair on your head as possible.