sentences:  Dual use of tobacco products and non-tobacco nicotine by continuing smokers is another aspect which has raised concern.It is suggested that dual use could inadvertently sustain smoking by making it easier for smokers to temporarily abstain from tobacco use, or encourage smokers to move towards dual use rather than complete cessation in the mistaken belief that this offers significant health gains.Dual use of tobacco and NRT is licensed by the Medicines and Healthcare products Regulatory Authority (MHRA) as a tobacco harm reduction strategy which actually increases the chance of quitting.