A review published in Current Molecular Pharmacology reveals that lactylation—a novel protein modification driven by lactate—plays a critical role in lung cancer progression and therapy resistance. The study outlines a “reflex arc” of writers, erasers, and readers, highlighting how histone and non‑histone lactylation drive immune escape, metabolic rewiring, and resistance to chemotherapy, immunotherapy, and EGFR‑TKIs. The authors propose targeting the lactate‑lactylation axis as a promising therapeutic strategy.