Checked 2026-11-10. Independent clinical review has not been completed. WADAFUK is independent of WADA and does not provide medical advice or an individual anti-doping determination.
Prohibited at all times
2026: prohibited at all times (S0). [1]
2026 List, S0, printed page 4 · 2026 rules apply from 1 January 2026. Any 2027 material below concerns future rules from 1 January 2027; it is not current clearance.
Identity and mechanism
2,4-dinitrophenol, or DNP, is a manufactured industrial chemical, not a dietary nutrient. It is one member of the dinitrophenol family; evidence about other isomers should not be silently substituted for it. [2]
DNP disrupts mitochondrial energy coupling. More energy is released as heat rather than being captured efficiently as ATP, which can cause dangerous overheating and systemic toxicity. This mechanism does not provide a dependable safe-use threshold. [3]
Human evidence and health risk
A US/UK poison-centre study described 204 DNP exposure cases reported during 2007–2018, including deaths. These are selected poisoning reports, not a controlled weight-loss trial or a denominator-based estimate of risk among all users. Only the primary-study abstract was available through the institutional repository. [4]
UK public-health guidance warns of severe poisoning and death. Signs can include marked sweating, rapid breathing and a fast or irregular heartbeat. Suspected ingestion warrants immediate medical assessment, rather than waiting for symptoms to settle. [5]
Where exposure occurs
ATSDR describes industrial and contaminated-site exposure and the historical use of DNP in diet pills. Current weight-loss or bodybuilding marketing should not be mistaken for a legitimate nutritional role. Environmental contamination is a different exposure context from deliberately taking a DNP product. [2] [5]
What remains uncertain
- The poison-centre paper was not available in full text.
- No product-specific assay, exposure estimate or individual risk calculation was performed.
Check the sources.
These are concise editorial paraphrases of selected sources, not a systematic review or a reproduction of source tables. Access depth is shown for each reference; an abstract-only check cannot resolve details found only in a full paper.
- WADA 2026 Prohibited List ↗Accessed 2026-11-10 · official_full_text_relevant_sections
Effective date; S0 printed page 4; S2 printed pages 7–8
- ATSDR ToxFAQs: dinitrophenols ↗Accessed 2026-11-10 · official_full_text_relevant_sections
Identity, uses, exposure and health effects
- ATSDR Toxicological Profile for Dinitrophenols, August 2021 ↗Accessed 2026-11-10 · official_full_text_relevant_sections
Summary printed page 4; sections 2.18.1 and 2.18.2
- Potts et al. 2021: US/UK DNP poison-centre cases ↗Accessed 2026-11-10 · abstract_only
Institutional abstract; DOI 10.1080/15563650.2020.1826505
- UK government: 2,4-dinitrophenol (DNP) ↗Accessed 2026-11-10 · official_full_text_relevant_sections
DNP poisoning and health warnings
Check the current official WADA List and the relevant anti-doping authority for your sport, product, route and circumstances. Do not stop or change necessary treatment based on this page. Ask a qualified clinician about health decisions. Missing evidence does not establish safety.