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Abstract Background: Methanol causes so many severe toxicities. Chronic low dose methanol ingestion can cause severe toxicity. There are many unpublished reports from doctors about side effects of toxicity by methanol like blinding in chronic user of herbal essences. Regarding to kinds of herbal essences producing and side effects of its chronic using, probability, there is methanol in the process of making. Therefore we decided to evaluate rate of methanol in various products. Materials and Methods: In this cross-sectional analytic study, 3 samples of high consumption homemade herbal essences in Arak (Pussy, Mint, Fenugreek, Hedysarum, Dill and Chicory) and 3 samples of the same herbal essences from industrial products with trademarks were gathered. All of them have been analyzed with spectrophotometer in five times. Results: The maximum methanol concentration was related to a sample of industrial Mint (415.04 ppm) and the minimum methanol concentration was related to a sample of handmade Fenugreek (60.26 ppm). There was no significant difference between methanol concentration in handmade and industrial herbal essences. Conclusion: There is probability of methanol toxicity after chronic usage of some herbal essences. Due to lack of maximum permissible concentration for non methanol essences, it is recommended that a cut of point of methanol concentration was determined and inform people about it.

Keywords: Herbal, Essences, Methanol, Spectrophotometer

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