"Data on the elimination kinetics of the dinitrophenols or their metabolic products in humans were not found. The ATSDR's Toxicological Profile for Dinitrophenols also states that "No studies were located regarding distribution in humans after oral exposure to 2,4-DNP. Limited information is available regarding distribution in animals after oral exposure to 2,4-DNP." However, they do state that "Elimination from the body appears to be rapid, except possibly in cases of compromised liver function. This coincides with a review in the NEJM on the biological actions of dinitrophenol, which stated that "Judging from the metabolic response, DNP appears to be eliminated entirely in three or four days; in the presence of liver or kidney damage it is possible that the drug will be retained over a longer period. Oddly, more recent papers give an array of possible half-lives, ranging from 3 hours, to 5–14 days. Other recent papers maintain that the half-life in humans is unknown." copy/paste
gonna say this 1 more time...lol NOBODY KNOWS THE TRUE HALF LIFE OF DNP