Gotu kola has been used as a medicinal herb for thousands of years in India, China, and Indonesia. It was used to heal wounds, improve mental clarity, and treat skin conditions.
Gotu kola is a mild adaptogen, is mildly antibacterial, anti-viral, anti-inflammatory, anti-ulcerogenic, anxiolytic, a cerebral tonic, a circulatory stimulant, a diuretic, nervine and vulnerary.
A legendary saying in reference to Gotu Kola is: '2 leaves a day keeps the doctor away'. It has also been referred to as a 'pharmacy in one herb' and 'the fountain of life' (legend has it that a Chinese sage lived to over 200 years and attributed it partly to Gotu Kola).
It is one of the most important, rejuvinating herbs in Ayurvedic medicine particularly for: revitalising nerve and brain cells, promoting calmness and clarity, helping poor memory and lack of concentration, and to assist in balancing the left and right hemispeheres of the brain.
Gotu Kola is also renowned in helping alleviate the pain and symptoms assosciated with arthritis. Many success stories have been documented. In modern herbalism it is commonly used for varicose veins and chronic venous insufficiency, because of its beneficial effect on circulation.
It thrives in tropical and sub tropical climates. It is probably growing in your garden and you don't even know it (But be sure you have the right one before eating it!)
You can have it dried but the best effects is if you eat it straight from the earth as the volatile oils can be lost during processing. I have 6 leaves daily.
For more info, Isabell Shipard has a fantastic article on it in her book 'How can i use herbs in my daily life?'