The iQuit guide library
Quit smoking guides, science and motivation
Practical, research-backed articles for every stage of quitting, from choosing a method and planning your quit day to handling cravings and staying smoke-free.
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Does Nicotine Help You Focus? Concentration After Quitting
Does nicotine help you focus? Lab studies show modest real effects, and withdrawal itself hurts concentration. See how long brain fog lasts…
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Does Smoking Stunt Your Growth? What the Evidence Says
Does smoking stunt your growth? Evidence on height is limited, but smoking clearly slows lung growth in teens. See what studies found…
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Quit Smoking Text Message Programs vs Apps (2026)
Compare SmokefreeTXT-style text programs with quit smoking apps: how they work, who qualifies, the Cochrane evidence and how to use both together.
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Smoking and Stomach Ulcers: Healing After Quitting
Smoking and stomach ulcers: smoking raises H. pylori treatment failure and ulcer relapse. See what the NHS says, what trials found and…
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How to Quit Vaping While Pregnant: Safe Steps (2026)
How to quit vaping while pregnant: what the NHS and ACOG say, NRT in pregnancy, a step-by-step quit plan, cravings, and free…
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How Many Cigarettes Are Smoked Each Day Worldwide? 2026
How many cigarettes are smoked worldwide? Over 5 trillion in 2019 (Tobacco Atlas), about 13.7 billion a day by our math. Per-person…
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Black and Milds vs Cigarettes: Which Is Worse? (2026)
Black and Milds vs cigarettes in 2026: compare tobacco, nicotine, inhalation, cancer risk, flavors and cost using NCI and FDA sources, and…
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How Long Does It Take to Break the Smoking Habit?
Quitting has two clocks: withdrawal fades in weeks, habits take longer. See what the research found, why 21 days is a myth…
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Are Natural or Additive-Free Cigarettes Safer?
Are natural or additive-free cigarettes safer? No. The American Cancer Society says they have not been shown to be safer. See what…
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Can You Smoke While Taking Antibiotics? A Clear Answer
Can you smoke while taking antibiotics? No common antibiotic is on the NHS smoking-interaction list, but smoking can worsen infections. See the…
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Smart Lighter vs Quit Smoking App: Which Tracks Better?
Smart lighter or quit smoking app? What smart lighters record, what studies show, why availability is doubtful in 2026, and how a…
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Does Smoking Affect Your Liver? What Quitting Changes
Does smoking affect your liver? Evidence links it to worse fatty liver, scarring and liver cancer risk. See what quitting changes and…
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