Bibliography
Every primary source cited across the Nixd guides — 14 references with canonical URLs, fallback links, and the specific claim each one supports.
Health content lives or dies on the quality of its sources. This page lists every external study, government report, and primary reference linked from a Nixd guide — with the claim that reference backs and a fallback URL in case the canonical link rots.
We re-check every link on this page periodically. If a canonical link dies, we promote the fallback. If both die, we update the page with a working source or remove the citation. The intent is that if you click any link below, it works — and if it doesn't, we want to hear about it.
- 01
Supports Large post-market RCT (8,144 participants) that did not reproduce the original psychiatric concerns in varenicline. Underlies the FDA's removal of the black-box warning in 2016.
- 02
Supports Standard EULA referenced in /terms.
- 03
Supports PET imaging evidence that nicotine saturates α4β2 nAChR receptors in active smokers; relevant to the receptor upregulation/downregulation framing.
- 04
Supports Varenicline produces roughly 2.5–3× the long-term abstinence rates of placebo and outperforms NRT alone and bupropion alone.
- 05
Supports Most EVALI cases were traced to vitamin E acetate in illicit THC vape cartridges. EVALI from regulated nicotine vapes is rarer but documented.
- 06
Supports Top-level reference to the Cochrane Library for cessation systematic reviews.
- 07
Supports PET imaging evidence of receptor downregulation following cessation, with normalization across weeks. Underpins the 6-stage brain recovery model in the app.
- 08
Supports UK trial in which e-cigarettes outperformed nicotine-replacement therapy for cigarette smokers attempting to quit. Cited in /vs/nrt.
- 09
Supports NRT increases long-term abstinence rates by roughly 50–70% compared to placebo. The Cochrane review pools 130+ trials.
- 10
Supports Day 3 is the population peak for nicotine withdrawal symptom intensity across nearly every dimension.
- 11
Supports Crisis-line reference on /quit-vaping/symptoms/depression and supportive copy across the site.
- 12
Supports Cold turkey produces modestly higher 6-month abstinence rates than gradual reduction (~18% vs ~14%, pooled across 51 RCTs).
- 13
Supports Foundational reference for cardiovascular and pulmonary recovery timelines after smoking cessation, including 1-year halving of heart-disease risk and 2-year return to never-user heart-attack baseline.
- 14
Supports Smoking cessation produces significant decreases in anxiety, depression, and stress, with effect sizes comparable to antidepressant medication. Improvement showed up by week 6 and persisted long-term across 26 cohort studies.
How we choose what to cite
Three rules. One — peer-reviewed primary literature beats secondary summaries. Cochrane reviews, NEJM / BMJ / Lancet articles, NIH/PubMed-indexed studies. Two — government and major-health-org pages get cited when the question is about regulatory facts (CDC EVALI page, Surgeon General's report). Three — we don't cite blog posts, marketing pages, or other apps as evidence. Even our own.
Spot something wrong?
If a citation doesn't support the claim it's attached to — or if a link breaks before we catch it — email feedback@nixdapp.com. We re-audit this page quarterly and again whenever new evidence materially shifts the underlying claim.