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Dnp3.0

DNP (2,4-Dinitrophenol) Research

Mostly mechanism / observational

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 meta-analyses and randomised trials published 1934–2022.

Based on 6 studies · 1 meta-analysis

Confidence

Moderate confidence

By outcome

Weight & fat lossCauses real, rapid fat loss by uncoupling mitochondria — but with NO therapeutic margin: it has caused fatal hyperthermia, cardiac toxicity, cataracts, and death. Listed for information only; it is not a usable fat-loss aid. · Days (but unsafe at any dose)
Mostly mechanism / observational5 studies
Toxicity & death
Mostly mechanism / observational5 studies

Active research area

2 studies in the last 5 years · Latest meta-analysis: 2011

193419782022

1Meta-Analysis2011

Grundlingh J, Dargan PI, El-Zanfaly M, Wood DM · J Med Toxicol (2011)

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2Observational2022

In plain English: 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

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3Observational2021

In plain English: Case fatality was high ... (US 11.6%; UK 16.9%) ... acidosis, tachycardia, agitation/confusion and hyperpyrexia [were] retained as significant independent predictors of mortality.

Potts AJ, Bowman NJ, Seger DL, Thomas SHL · Clinical toxicology (2021)

Modern poison-centre series — 204 systemic DNP exposures reported to US and UK poisons centres over 2007-2018
High case-fatality: 11.6% (US) and 16.9% (UK); 86% of cases were under 40 and 71% male — the bodybuilding/dieting demographic
Tachycardia, hyperpyrexia, acidosis and agitation/confusion independently predicted death and should prompt rapid ICU escalation

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4Review2007

In plain English: 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

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5Case Study2016

In plain English: 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

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6Observational1934

In plain English: A critical survey of the clinical results of dinitrophenol used in the treatment of obesity and nutritional disorders.

Tainter ML, Cutting WC, Stockton AB · American journal of public health and the nation's health (1934)

The original 1930s clinical-use data — Tainter and Cutting's own critical survey of dinitrophenol as an obesity/weight-loss treatment
Documents the historical weight-loss effect via raised metabolic rate that made DNP a mass-market diet drug
Historical/observational clinical reporting, not a modern controlled trial — the top of the (old) human evidence pyramid for efficacy

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View in Research Library

DNP (2,4-Dinitrophenol) Research

Mostly mechanism / observational

2,4-dinitrophenol (DNP): a weight loss agent with significant acute toxicity and risk of death.

International trends in systemic human exposures to 2,4 dinitrophenol reported to poisons centres.

Toxicoepidemiology and predictors of death in 2,4-dinitrophenol (DNP) toxicity.

Dinitrophenol and obesity: an early twentieth-century regulatory dilemma.

Beware the yellow slimming pill: fatal 2,4-dinitrophenol overdose.

Use of Dinitrophenol in Nutritional Disorders: A Critical Survey of Clinical Results.