Original research is required, but I think it not unlikely that the Pramukhas of Balkh (= Barmakids of Baghdad) may have brought Indian some alchemical or longevity ideas to Baghdad in the late eighth century.  There is existing research showing that they brought Ayurvedic ideas. 

• Shefer-Mossensohn, M. and Hershkovitz, K. A. 2013. Early Muslim Medicine and the Indian Context: A Reinterpretation. Medieval Encounters 19(3), pp. 274–99. Available at: https://academia.edu/4049722.
• Wujastyk, D. 2016. From Balkh to Baghdad. Indian Science and the Birth of the Islamic Golden Age in the Eighth Century. Indian Journal of the History of Science 51(4), pp. 679–90. Available at: https://www.academia.edu/30576715.

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Professor Dominik Wujastyk

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Singhmar Chair in Classical Indian Society and Polity

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Department of History and Classics

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University of Alberta, Canada

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South Asia at the U of A:

 

sas.ualberta.ca