▎ 摘　　要

NOVELTY - Pharmaceutical composition, food composition or composition comprises a nano-graphene structure, as an active ingredient. USE - The pharmaceutical composition, food composition or composition is useful for preparing a food or agent for preventing, treating or improving cancer by inhibiting mitophagy of mitochondria, killing cell and inducing cell death in a subject. The composition is also useful in adjuvant anticancer treatment. The cancer is at least one chosen from thyroid cancer, cervical cancer, brain cancer, lung cancer, ovarian cancer, bladder cancer, kidney cancer, liver cancer, pancreatic cancer, prostate cancer, skin cancer, tongue cancer, breast cancer, uterine cancer, stomach cancer, rectal cancer, colorectal cancer, blood cancer, bone cancer, oral cancer, pharynx cancer, laryngeal cancer, and colon cancer (all claimed). ADVANTAGE - The composition exhibits excellent anticancer effects when applied to various diseases related to abnormal cell accumulation without causing resistance or toxicity.