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Dnp3.0
DNP (2,4-Dinitrophenol) Research
Mostly mechanism / observationalLimited safety
6 peer-reviewed studies
What the evidence says
Mostly mechanism / observational
Most DNP (2,4-Dinitrophenol) studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from mixed-quality studies published 1934–2022.
Based on 6 studies
Confidence
Low
By outcome
Weight & fat loss
Mostly mechanism / observational5 studies
Toxicity & death
Mostly mechanism / observational5 studies
Active research area
2 studies in the last 5 years
193419782022
1Review2011
DNP is reported to cause rapid loss of weight, but unfortunately is associated with an unacceptably high rate of significant adverse effects ... eventually leading to death.
Grundlingh J, Dargan PI, El-Zanfaly M, Wood DM · Journal of medical toxicology (2011)
Field-defining toxicology review — establishes the core honesty gate: DNP causes rapid weight loss by uncoupling oxidative phosphorylation, but at an unacceptable cost
The classic toxidrome is hyperthermia, tachycardia, diaphoresis and tachypnoea, progressing to death
Counted 62 published deaths attributed to DNP at the time of review, with fatalities reported since the early twentieth century
Case fatality was high ... (US 11.6%; UK 16.9%) ... acidosis, tachycardia, agitation/confusion and hyperpyrexia [were] retained as significant independent predictors of mortality.
DNP ... reduces body weight and body fat by uncoupling oxidative phosphorylation but at the risk of severe dose-related toxicity ... case fatality was high (11.9%) ... with fatal outcomes common.
Gziut T, Thomas SHL · Clinical toxicology (2022)
WHO-collaborative international series — 456 DNP exposures reported by poisons centres across 38 countries (2010-2020)
States the mechanism plainly: DNP reduces body weight and fat by uncoupling oxidative phosphorylation, at the cost of severe dose-related toxicity
Annual cases rose from 4 (2010) to 71 (2015); case-fatality 11.9% with no significant sex difference
The compound's therapeutic index was razor thin and it was not until thousands of people suffered irreversible harm that mainstream physicians realized that dinitrophenol's risks outweighed its benefits and abandoned its use.
Colman E · Regulatory toxicology and pharmacology (2007)
Historical review (FDA author) of how DNP became a 1930s weight-loss drug via Maurice Tainter and was then abandoned
States the defining safety fact: the therapeutic index was 'razor thin' and thousands suffered irreversible harm before use was abandoned
Irreversible harms included cataracts; the 1938 Food, Drug, and Cosmetic Act gave regulators the power to halt its sale
It is extremely toxic in overdose and has a narrow therapeutic window with significant interindividual variability in metabolism ... No antidote currently exists and overdose is often fatal.
Holborow A, Purnell RM, Wong JF · BMJ case reports (2016)
Case report of a fatal intentional DNP overdose in a young man — the lethal endpoint, grounded in a single patient
States the two defining dangers: a narrow therapeutic window with wide interindividual metabolic variability, and NO antidote
Internet-based sales have increased both accidental and intentional overdoses presenting to UK emergency departments