RecruitingPhase 1Drug trialCBG/CBD Oil for Chemotherapy-Induced Peripheral NeuropathyThe goal of this clinical trial is to learn if a commercially available cannabigerol (CBG)/cannabidiol (CBD) oil is safe, feasible to use, and can help reduce symptoms of chemotherapy-induced peripheral neuropathy (CIPN) in adults who have completed platinum-based chemotherapy for gastrointestinal cancers. The main questions it aims to answer are: Is CBG/CBD oil safe and well-tolerated over a 12-week treatment period? Can participants with CIPN use CBG/CBD oil consistently as part of their care? Does CBG/CBD oil help reduce pain, numbness, or other symptoms of CIPN? Participants will: Take CBG/CBD oil under the tongue (sublingually) twice daily for 12 weeks Complete regular symptom assessments and functional tests during study visits Provide blood samples for cannabinoid and metabolite level testing