2,4-dinitrophenol (DNP)

DNP is an oral small-molecule mitochondrial uncoupler, not a peptide. People seek it for rapid weight loss. The same mechanism can cause lethal hyperthermia and cardiovascular collapse.

tier F · weight loss · at least 62 published deaths counted in a 2011 medical-literature review

verdict

DNP can cause weight loss. Uncontrolled 1930s clinical series reported 2 to 3 pounds weekly, but the same uncoupling has caused fatal hyperthermia and cardiovascular collapse, and no established antidote stops it.

the core tension

DNP can cause weight loss, but the same mitochondrial uncoupling can cause lethal hyperthermia and cardiovascular collapse. No established antidote reverses it.

what it is

2,4-Dinitrophenol is an oral small-molecule mitochondrial protonophore, not a peptide. It is an industrial chemical that was used for weight loss in the 1930s and has never been approved by the FDA as a drug.

what it does

DNP carries protons across the inner mitochondrial membrane. Fuel still burns, but less of its energy becomes ATP and more escapes as heat. That can raise energy expenditure and can also drive lethal hyperthermia and cardiovascular collapse.

origin

Uncontrolled clinical reports from the 1930s recorded weight loss. In 2016, the FDA identified 110 websites selling DNP as a weight-loss product while stating that DNP had never been approved by the FDA as a drug.

does it work

Yes, with a hard evidence boundary. The historical clinical survey reported weight loss of 2 to 3 pounds weekly. These were uncontrolled series, not a modern randomized efficacy or safety trial.

key facts

• molecular formula: C6H4N2O5
• amino acids: n/a (small molecule, not a peptide)
• half-life: not structured; no routine-use human value
• type: small-molecule mitochondrial protonophore and oxidative-phosphorylation uncoupler
• 2 to 3 lb weekly loss reported in uncontrolled historical series
• 46 h mouse metabolite elimination half-life
• 26 h mouse metabolite elimination half-life
• at least 62 published deaths counted in a 2011 review
• 110 weight-loss websites identified by FDA in 2016

frequently asked questions

Does DNP cause weight loss?

Yes. Uncontrolled 1930s clinical series reported weight loss of 2 to 3 pounds weekly. They were not modern randomized trials.

Why is DNP dangerous?

It uncouples fuel oxidation from ATP production. More energy leaves as heat, and severe poisoning can progress to hyperthermia and cardiovascular collapse.

Is there an antidote for DNP poisoning?

No established antidote directly reverses mitochondrial uncoupling.

What is DNP's half-life?

No routine-use human value is shown. The 46-hour and 26-hour values in the mouse paper belong to metabolites, not parent DNP, and the human record is occupational poisoning rather than oral treatment.

related peptides

• BAM15: a preclinical uncoupler developed for a wider animal safety window, with no human exposure data
• semaglutide: an approved obesity medicine with controlled human outcomes and safety monitoring
• tirzepatide: an approval-grade weight-loss comparator

reptides grades the research record and cites the literature behind every call. research reference only; not medical advice.