As a traditional medicine, many ayurveda products have not been tested in rigorous scientific studies and clinical trials. In India, research in ayurveda is undertaken by the statutory body of the Central Government, the Central Council for Research in Ayurveda and Siddha (CCRAS), through a national network of research institutes. A systematic review of ayurveda treatments for rheumatoid arthritis concluded that there was insufficient evidence, as most of the trials were not done properly, and the one high-quality trial showed no benefits. A review of ayurveda and cardiovascular disease concluded that the evidence for ayurveda was not convincing, though some herbs seemed promising.
Two varieties of Salvia have been tested in small trials; one trial provided evidence that Salvia lavandulifolia (Spanish sage) may improve word recall in young adults, and another provided evidence that Salvia officinalis (Common sage) may improve symptoms in Alzheimer's patients. Many plants used as rasayana (rejuvenation) medications are potent antioxidants. Neem appears to have beneficial pharmacological properties. Turmeric and curcumin have shown effectiveness in preventing cancer in vitro.
Recently, there are some PubMed indexed journals being published in the field of Ayurveda.
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