Tobacco · 12 hours
Carbon monoxide back to normal
Blood oxygen recovers as carbon monoxide clears.
Source: WHO, CDC
Private beta
Quit.
Quit.
Watch your body regen.
ReGen tracks quitting nicotine, alcohol, cannabis, caffeine and sugar, and shows you what is healing inside, organ by organ, day by day.
Free during beta. We only email you when there is a place for you. Privacy policy
Tuesday, 3 March
Good morning
Your body today
- Circulation and lung function improve
- Liver inflammation settles
Tobacco128 days
Next: coughing and breathlessness ease
Alcohol128 days
Next: brain volume recovers
- Tobaccolungs, heart, circulation
- Vapingairways, brain
- Nicotine pouchesgums and mouth, brain
- Alcoholliver, sleep, blood pressure
- Caffeine and energy drinksbrain, sleep
- Cannabisbrain, sleep
- Sugarteeth, taste
How it works
Not a streak counter. A recovery map.
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Pick your habits and quit date
One habit or several, starting now, tonight or next Monday. Add what you used to spend and watch the savings build.
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Watch milestones unlock
From “Carbon monoxide back to normal” at 12 hours to “Heart disease risk halves” at 1 year, each milestone lights up an organ on your body map.
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Slip? It is a dip, not a restart
One cigarette after a month doesn't wipe a month. ReGen shows what it set back, and how soon you are back on track.
Your progress is kept, honestly.
In ReGen, short term milestones like carbon monoxide and nicotine restart from your last slip. Long term milestones only take a small dip. Repeated slips add up, a single one rarely does. The size of a dip is a working estimate, not a medical measurement.
What heals, and when
Your body starts the moment you stop.
Vaping · 3 days
Nicotine has left your body
Cravings and irritability often peak around here.
Source: CDC
Alcohol · 2 to 6 weeks
Fatty liver reverses
Fat starts clearing within days and can fully reverse in 2 to 6 weeks without alcohol.
Source: NHS
Cannabis · 2 days to 4 weeks
CB1 receptors back to normal
Brain cannabinoid receptors start recovering within 2 days and return to normal in about 4 weeks.
Source: Hirvonen J et al. (2012), Molecular Psychiatry
Everyone recovers at their own pace. Percentages show progress toward a milestone, not a medical measurement.
Privacy
Private by design.
Your quit data lives in your own account, stored in Europe. No ads, no tracking, no community feed unless you choose one later. No other user can see your slips.
Read the privacy policyHealth note
ReGen is not medical advice. If you drank heavily every day, stopping suddenly can cause dangerous withdrawal. Speak to a doctor before you quit.
Take damage. Regen.
ReGen is in private beta. Leave your email and we'll let you in as places open.
We only use your email to invite you. Privacy policy