Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Calamus (Acorus calamus), also known as sweet flag, has a long history of use in traditional medicine systems such as Ayurveda and Traditional Chinese Medicine. In these traditions, calamus root has been used as a calming agent and as a remedy for nervous system disorders, including insomnia. The rationale for its use is based largely on anecdotal evidence and traditional knowledge, where it is believed to have sedative and tranquilizing properties. However, scientific evidence supporting the efficacy of calamus for treating insomnia is extremely limited. There are very few clinical studies, and those that exist are either animal-based or of poor methodological quality. Most scientific literature on calamus focuses on its potential toxicity, particularly due to the presence of β-asarone, a compound that has shown carcinogenic effects in animal studies. Regulatory agencies in some countries have restricted the use of calamus extracts containing β-asarone. In summary, while there is a traditional basis for using calamus as a sleep aid, this is not corroborated by robust scientific research, and concerns about safety further limit its use for insomnia management.

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