Lemon balm (Melissa officinalis) is a perennial shrub and widely used herb native to the Eastern Mediterranean region and Western Asia. It has traditionally been used for a variety of cognitive purposes, most of which are centered around improving cognition and reducing stress and anxiety. Lemon balm contains numerous chemical compounds, including polyphenolic compounds (rosmarinic acid, caffeic acid and protocatechuic acid), essencial oils (citral), monotherpenoid aldehides, sesquiterpenes, flavonoids (luteolin) and tannins.
120 broiler chickens involved in a research study with a purpose of investigating the effects of diet supplementation with 0.2% lemon balm extract supplied in the drinking water showed potential as a healthy supplement to aid in improvement of the chickens' antioxidant status.
Chicken care bloggers report that many use lemon balm in their nestboxes, for its use as a form of aromatherapy, repellent of rodents, and antibacterial properties. The leaves can be added to nestboxes in fresh or dried form.