why do teenagers smoke cigarettes Teens who are literally destroying their own brain cells, study says Young people and smoking -

PLoS ONE 11 , e0146080, 10.1371/journal.pone.0146080 (2016)

And the count was more than 30 cigarettes when I drank, says Khanna

Winstanley M, Woodward S, and Walker N, Tobacco in Australia: facts and issues, 1995

A study published in the British Medical Journal found that smoking cessation is associated with reduced depression, anxiety, and stress, and improved positive mood and quality of life compared with continuing to smoke. The benefits were particularly marked for those subjects currently being treated with antidepressants

For a deep clean, its worth getting them professionally cleaned

Images comparing brain responses to the first dose of nicotine and to the fifth dose given four days later illustrate the dramatic changes in brain function in areas such as the anterior cingulate gyrus and hippocampus