If your hormone levels are not where you would like them to be, this could lead to feelings of fatigue as well as irritability. A lack of sufficient rest, stress, or an improper diet are all potential causes behind having low hormonal amounts within the body. To create higher hormone amounts within the body: reduce stress through relaxation techniques such as deep breathing exercises; aim for at least 8 hours of sleep each night; eat foods that are high in healthy fats like avocados and nuts while also being good sources of protein.