Medical nutrition therapy (MNT) is a vital, evidence-based approach employed by oncologists and dietitians to enhance cancer treatment and recovery. By delivering personalized dietary interventions tailored to individual medical needs, MNT addresses complications like malnutrition—affecting up to 80% of cancer patients—through strategies that combat cachexia, manage treatment side effects, boost immune function, and optimize chemotherapy effectiveness. Despite its proven benefits, MNT is often underutilized, leading to diminished quality of life and recovery outcomes. Advocating for a referral to an RDN specializing in oncology can significantly impact recovery. Embracing MNT as a standard part of cancer care will improve overall patient outcomes and well-being.