Cold turkey works in only 3–5% of attempts. Cochrane review of 136 trials (64,640 people) found NRT increases quit success by 50–60%. This 2026 guide covers 2mg vs 4mg gum, the chew-and-park technique most people get wrong, combination patch and gum (17% vs 14% success), a 10-treatment comparison table, and why 50% of NRT users stop far too early.