Researchers at the University of California San Francisco conducted a study designed to understand why tobacco companies shifted from seeing nicotine replacement products (NRT) as a threat then eventually to a business opportunity.
What they claim to have found is that tobacco companies have known for decades that NRT products like nicotine gum, lozenges, sprays, and patches, hardly ever work when they aren’t used in combination with counseling. Knowing this, tobacco companies started to sell it.