According to research results published in the journal PLOS ONE, reduced nicotine levels in cigarettes may aid smokers with anxiety or mood disorders in quitting without endangering their mental health. 

Lowering the amount of nicotine in cigarettes may lessen addiction, decrease exposure to pollutants, and increase smokers′ chances of quitting.

188 smokers who had no intention of stopping and had a history of or were presently experiencing a mood or anxiety disorder were included in the study. The nicotine content of study cigarettes (11.6 mg/cigarette) or cigarettes with nicotine gradually lowered over 18 weeks to just 0.2 mg/cigarette was administered to volunteers, randomly assigned to two groups.

The researchers employed Kessler Psychological Distress Scale to measured levels of cotinine, a nicotine metabolite, dangerous chemical concentrations, cigarette dependence indices, and numerous mental health indicators.

According to experts, the reduced nicotine content group consumed less harmful carcinogens such as the biomarker 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol, also known as NNAL and absorbed less nicotine. Compared to the control group (who received cigarettes with the standard nicotine level), those randomly assigned to lower nicotine content cigarettes were more likely to have given up smoking 12 weeks later (18.1%). (4.3%).

These findings imply that smokers with mood and anxiety disorders could successfully quit smoking with the proper assistance and tools. 

(Source: https://theprint.in/health/reduced-nicotine-cigarettes-make-anxious-smokers-smoke-less/1237719/)