Cancer Advisor

Quick Answer The supplements with the strongest human research behind them are vitamin D3 (paired with K2 and magnesium) , curcumin , omega-3 fatty acids , and green tea EGCG — each backed by multiple randomized controlled trials or meta-analyses, though results are mixed rather than uniformly positive. Melatonin looked promising in older, smaller trials, but the largest randomized trial to date found no overall survival benefit. No supplement replaces conventional cancer treatment, and a few — high-dose beta-carotene, vitamin E, and high-dose B6/B12 — have been linked to increased cancer risk in specific groups. Antioxidant supplements are generally discouraged during chemotherapy or radiotherapy unless a doctor directs otherwise. This is an educational overview, not personal medical advice — always loop in your oncology team before starting anything new. Disclosure: Some links in this article are affiliate links (including The Wellness Company and Amazon Associates). If ...

Medically Reviewed by: OneDayMD Editorial Team | Evidence Synthesis & Safety Review | Last Updated: August 2026 Quick Answer Ivermectin, fenbendazole, and mebendazole are antiparasitic drugs with laboratory evidence of anticancer activity.  The pharmacological rationale is real and merits continued, properly controlled trial investment. Patients should discuss any interest in these agents openly with their oncology team rather than self-administering veterinary or compounded formulations.  This article separates the genuine research question from the unverified claims, and outlines what to discuss with an oncology team before considering any of these agents. Background: Ivermectin and the benzimidazole anthelmintics fenbendazole and mebendazole have attracted sustained public attention as repurposed anticancer agents, driven substantially by social media case testimonials and a small number of peer-reviewed mechanistic studies. Objective: To synthesize the precl...