Independent · Reader-supported
Understand your lung health.
Make informed choices.
Practical guides, clear product comparisons and a closer look at the evidence.
What would you like help with?
Where would you like to start?
Everything on Lung Secret is free to read and use.
Guides
What actually helps after quitting smoking, foods linked to lung health, home breathing exercises and how to spot hype.
Free tools
A habits quiz, pack-year calculator, quit timeline, cost calculator and breathing exerciser. Quick, free and easy to use.
Reviews
Label-based reviews of lung support supplements and devices like pulse oximeters and air purifiers. No disease claims, no made-up results.
How lung-friendly are your daily habits?
Ten quick questions about smoke, air quality, work, activity, diet and vaccines. Get a simple score and practical tips. It is a habits check, not a diagnosis.
More free tools
Simple, private calculators built from published sources.
Quit-smoking timeline
See which health milestones you have typically reached since your quit date.
Pack-year calculator
Work out your smoking history and what US screening guidance says about it.
Supplement cost calculator
Compare up to three products by real cost per day, month and year.
Breathing exerciser
Follow a calm, animated guide through four breathing patterns.
How we review
Trust is the whole point of this site. Here is what we do on every page.
We read the research
We start with US health agencies, PubMed and Cochrane reviews, and link every source so you can check it.
We read the label
Supplement reviews are based on the label, published research and user feedback. We only say we tested something if we did.
We flag the limits
No disease claims. We say when evidence is weak and tell you when to see a doctor. Read our Editorial Policy.
Explore our lung health guides
Start with the question on your mind. Find clear explanations, practical ideas and links to the evidence.
Lung health guides
After quitting smoking
Understand the recovery timeline and practical steps after your last cigarette.
Read the guide
Lung health guides
Breathing exercises at home
Explore gentle breathing techniques, how to practise them and when to seek advice.
Read the guide
Lung health guides
Food and lung health
Look at the research on everyday foods, nutrients and balanced eating.
Read the guide
Lung health guides
Do lung supplements work?
Separate lung detox marketing from what the evidence actually shows.
Read the guide
Lung health guides
Understand common ingredients
Learn about mullein, quercetin, bromelain and the limits of ingredient research.
Read the guide
Lung health guides
Spot misleading supplement claims
Recognise red flags and check product claims before spending your money.
Read the guideReader-supported · Sources cited · Not medical advice · How we make money