This humble plant is a very valuable herbal medicine. It is calming and uplifting, ideal for anxiety and mild depression and palpitations of nervous origin. It has a beneficial effect on the digestive system, especially where anxiety plays a part. Finally, it is anti-viral, specifically against the cold-sore virus where it may be taken internally and externally. See under aromatic waters. Suitable for children.Lemon balm is considered to have a hypothyroid effect by some authorities, but this has net been proven by scietnific research.