❋ Detoxcellence

Cigarette Smoking (Firsthand)

Directly inhaling tobacco combustion products.

11Severe burden · out of 100
Cleaner swapEvidence-based cessation support and nicotine-replacement

How this score is built

  1. 100Start
  2. 54Chemical hazard 10 × 4.6−46
  3. 26.8Everyday exposure 8 × 3.4−27.2
  4. 11Persistence 6 × 2.6−15.6, then rounded to 11
  5. SevereThe band11 sits in 1–19.

What each input rests on

The three ratings behind the score, and the studies each rests on
InputRatingEvidence
Chemical hazard10/10

  • In 34,439 male British doctors followed for 50 years, men born 1900 to 1930 who kept smoking cigarettes died about 10 years younger than lifelong non-smokers; stopping at 50 halved the excess hazard and stopping at 30 avoided almost all of it.

    Mortality in relation to smoking: 50 years' observations on male British doctors · BMJ 2004

    DOI 10.1136/bmj.38142.554479.AE · PMID 15213107 · Abstract, Results and Conclusion · read 2026-10-21

Everyday exposure8/10unsourced input
Persistence6/10unsourced input

Ratings are editorial. A study listed here supports the rating; it did not compute it. How the index is built

What this means for you

The chemical-hazard rating is what drives the score down. Firsthand tobacco smoke is one of the largest avoidable exposures there is, delivering thousands of toxicants including known carcinogens. Cessation services meaningfully improve the odds of quitting.

Evidence strength: strong

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Lower-exposure choices

89
Regular Sauna UseMinimal · Environment
89
Regular Exercise & SweatMinimal · Environment

All 19 environment entries, highest burden first →