Vitamin D Supplementation on Reported Rates of Taxane-Induced Neuropathy

This is a two-arm randomized clinical trial in which 80 participants with Vitamin D deficiency and scheduled to begin taxane-based chemotherapy will be randomized to either: 1) prescribed vitamin D replacement or 2) standard of care (advised to take over the counter (OTC) vitamin D). All participants will have blood drawn for serum vitamin D analysis at Weeks 4, 8, 12, and 24 in order to document Vitamin D levels and titrate vitamin D dose (if needed in the treatment arm). Participants in both arms will complete self-report measures of neuropathic pain at baseline, Week 12, and Week 24.