Gotu kola (Centella asiatica) is a herb that has a long history of use as a general tonic. Gotu kola is a herb that is used in traditional Ayurvedic medicine, and it has been extensively researched for its health effects. Gotu kola is an adaptogen, which means it can normalise the disruption to physiological systems that are caused by stress. One system it is particularly good at normalising is cognitive function. For example, in one study researchers administered 1000 mg per day or 750 mg per day gotu kola to patients with poststroke cognitive impairment. As a positive control, other subjects received 3 mg per day folic acid, as this is known to cause improvements in cognitive function following strokes. After 6 weeks of treatment all of the treatments improved cognitive function in the subjects and there was no difference in the effectiveness of the treatments. Therefore gotu kola appears to be as effective as folic acid in the treatment of patients with poststroke cognitive impairment.
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