There isnt a safe cycle with DNP, its lazy and stupid IMHO but best of luck you will need it.
yes it is toxic check out this paper on it
http://msds.chem.ox.ac.uk/DI/2,4-dinitrophenol.html.
The mechanism by which it works is fantastic; however, the problem lies in the fact that the LD50 (lethal dose) of the stuff is way too close to the "effective" dose. This makes even the slightest miscalculation a disaster. This fact alone would cause a pharmacologist to declare the drug unfit for consumption. The therapeutic dosage is very near the harmful dosage. That makes half life and elimination critical. These things can vary, so that makes it unsafe.Here is just one study
1: J Anal Toxicol. 2006 Apr;30(3):219-22. Links
Two deaths attributed to the use of 2,4-dinitrophenol.
Miranda EJ, McIntyre IM, Parker DR, Gary RD, Logan BK.
Washington State Toxicology Laboratory, Washington State Patrol, 2203 Airport Way South, Seattle, Washington 98134, USA.
We report the cases of two individuals, one in Tacoma, WA, and the second in San Diego, CA, whose deaths were attributed to ingestion of 2,4-dinitrophenol (2,4-DNP). 2,4-DNP has historically been used as a herbicide and fungicide. By uncoupling mitochondrial oxidative phosphorylation, the drug causes a marked increase in fat metabolism that has led to its use to aid weight loss. Both cases reported here involved its use for this purpose. Features common to both cases included markedly elevated body temperature, rapid pulse and respiration, yellow coloring of the viscera at autopsy, history of use of weight loss or body building supplements, and presence of a yellow powder at the decedent's residence. Because of its acidic nature, the drug is not detected in the basic drug fraction of most analytical protocols, but it is recovered in the acid/neutral fraction of biological extracts and can be measured by high-performance liquid chromatography or gas chromatography-mass spectrometry. The concentration of 2,4-DNP in the admission blood samples of the two deaths reported here were 36.1 and 28 mg/L, respectively. Death in both cases was attributed to 2,4-DNP toxicity. Review of information available on the internet suggests that, although banned, 2,4-DNP is still illicitly promoted for weight loss.
PMID: 16803658 [PubMed - indexed for MEDLINE]