Health Topic

Smoking and Youth

The younger you are when you start smoking, the more health problems it can cause. Know the risks of smoking cigarettes for people under age 21.

Reviewed Reviewed by a registered pharmacistGeneral information

Also called: Teen smoking

Important: This page is general information, not medical advice. It does not recommend or prescribe any treatment. Always consult your doctor or pharmacist before starting, stopping or changing any medicine.

About Smoking and Youth

Smoking cigarettes has many health risks for everyone. However, the younger you are when you start smoking, the more problems it can cause. People who start smoking before the age of 21 have the hardest time quitting. Teens who smoke are also more likely to use alcohol and illegal drugs.

The problem is not just cigarettes. Spit tobacco, e-cigarettes, and cigars are not safe alternatives to cigarettes. Low-tar and additive-free tobacco products are not safe either.

Young people who do not start using tobacco by age 18 will most likely never start.

Centers for Disease Control and Prevention

It sits within Children and Teenagers and Substance Use and Disorders.

The lead U.S. institute for this subject is the National Institute on Drug Abuse.

When to speak to someone. Reading about a topic cannot tell you whether it applies to you. Speak to a doctor or pharmacist if symptoms are severe, sudden, getting worse, or simply not going away — and seek emergency care immediately for chest pain, breathing difficulty, sudden weakness or confusion, or a serious allergic reaction.

Research on Smoking and Youth

94 studies areregistered for this condition on ClinicalTrials.gov, the U.S. National Library of Medicine's public registry. A selection is below — the links go straight to the registry entry, not to a summary of ours.

What a registered study does and does not mean. Registration means a study exists and has been declared publicly. It says nothing about whether the treatment being tested works, is safe, or is available to you. Many studies find no benefit — that is what research is for. Never seek out an experimental treatment on the strength of a registry entry alone.

Research currently under way

Research already completed

Study data from ClinicalTrials.gov, a service of the U.S. National Library of Medicine. Retrieved 2026-07-30. Registry entries are supplied by study sponsors and investigators; ClinicalTrials.gov does not verify their scientific validity. PocketsInfo is not affiliated with, and not endorsed by, the NLM or the NIH.

Where to read more

Rather than paraphrase, we point you to the primary sources. Every link below is to a government health agency, a national institute or a recognised medical body — grouped by what you are trying to find out.

Start Here

Prevention and Risk Factors

  • Know the RisksNational Cancer Institute, Tobacco Control Research Branch

Statistics and Research

Clinical Trials

Medical subject headings

Clinicians and researchers index this subject under Smoking. These are the terms to use when searching medical literature.

This page is built from the MedlinePlus health topic record for Smoking and Youth, a service of the U.S. National Library of Medicine (NLM), National Institutes of Health. Information is from MedlinePlus.gov. PocketsInfo is not affiliated with, and is not endorsed by, the NLM or the NIH. Retrieved 30 July 2026.