The occurrence of Parkinson's disease (PD) is known to be associated both with increased nigrostriatal iron content and with low serum cholesterol and PD, but there has been no study to determine a potential relationship between these two factors.
Du, G., Lewis, M. M., Shaffer, M. L., Chen, H., Yang, Q. X., Mailman, R. B., & Huang, X. (2012). Serum cholesterol and nigrostriatal R2* values in Parkinson’s disease. PLoS ONE, 7(4). https://doi.org/10.1371/journal.pone.0035397