A cross-sectional study of serum vitamin B6 levels in people living with Parkinson's disease

The purpose of this study is to estimate the prevalence of abnormal serum levels of vitamin B6, and the associations of those levels with demographic and clinical variables in a randomly selected sample of people living with Parkinson's disease, compared to historical controls.The results of the study are published here:- Lizarraga KJ, Wang L, Mesmer H, Shah N, Barbosa W, Logigian E, McDermott MP, Lang AE. Prevalence and associations of abnormal levels of vitamin B6 in people with Parkinson’s disease. Movement Disorders Clinical Practice 2026 Oct 14 [Epub 2026 Oct 14]. DOI: 10.1002/mdc3.70865. PMID 42872538 (https://pubmed.ncbi.nlm.nih.gov/42872538/).- Lizarraga KJ, Kanner AM, Lang AE. Vitamin B6 deficiency and status epilepticus: A preventable cause of death in people with Parkinson’s disease. Movement Disorders 2026 Oct 14 [Epub 2026 Oct 14]. DOI: 10.1002/mds.70580. PMID 42872523 (https://pubmed.ncbi.nlm.nih.gov/42872523/).The data collected for the study, including deidentified, individual participant and control data, and a data dictionary defining each field in the set, are available at the University of Rochester Research Repository (https://doi.org/10.60593/ur.d.32509488).The study was approved by the Research Subjects Review Board of the University of Rochester (STUDY00009245), and it is registered on ClinicalTrials.gov (https://clinicaltrials.gov/study/NCT07430722).