title: Nicotine intake and its regulation.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D006801:Humans; D009538:Nicotine / Q000009:adverse effects* / Q000097:blood; D012056:Reinforcement, Social; D012907:Smoking; D013375:Substance Withdrawal Syndrome; D019966:Substance-Related Disorders / Q000453:epidemiology* / Q000523:psychology; D006113:United Kingdom
chemical_list: D009538:Nicotine