Lemon balm extract has a light, lemony flavor and seems to have health-promoting properties. Lemon balm extract can improve elasticity of the arteries. Arterial stiffness is considered a risk factor for heart disease, stroke and mental decline. This herb can also improve high blood lipid levels. Lemon balm can improves mood and mental performance, calmness and memory. It also can reduced the frequency of heart palpitations and anxiety.