Simplify the following text for a Grade 10 native English-speaking person.
Original: Nicotine replacement therapy ( commonly abbreviated to NRT ) is the remedial administration of nicotine to the body by means other than tobacco , usually as part of smoking cessation .
Simplified: Nicotine replacement therapy ( NRT ) is there to reduce the dependency symptoms . This is usually done by delivering nicotine ( or a substance very similar to it ) in other ways .