Inositol is an ingredient similar to glucose. It has been found to enhance intracellular calcium signalling (1) as well as reducing blood glucose levels, however more research needs to be done on this topic as it has not been fully proven (2).
1 – Berridge, M. J., & Irvine, R. F. (1989). Inositol phosphates and cell signalling.
2 – Dyck, P. J., Zimmerman, B. R., Vilen, T. H., Minnerath, S. R., Karnes, J. L., Yao, J. K., & Poduslo, J. F. (1988). Nerve glucose, fructose, sorbitol, myo-inositol, and fiber degeneration and regeneration in diabetic neuropathy. New England Journal of Medicine, 319(9), 542-548.