Here's what Dr. Wikipedia has to say about it: Di

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Dichloroacetic acid (DCA), sometimes called bichloroacetic acid (BCA), is the chemical compound with formula CHCl
2COOH. It is an acid, an analogue of acetic acid, in which 2 of the 3 hydrogen atoms of the methyl group have been replaced by chlorine atoms. Like the other chloroacetic acids, it has various practical applications. The salts and esters of dichloroacetic acid are called dichloroacetates. Salts of DCA have been studied as potential drugs because they inhibit the enzyme pyruvate dehydrogenase kinase.[2]

Although preliminary studies have shown DCA can slow the growth of certain tumors in animal studies and in vitro studies, there is currently insufficient evidence to support the use of DCA for cancer treatment.[3][

..... Neuropathy has been a problem in some clinical trials with DCA causing them to be effectively halted ,[8] but a review found that it has not occurred in other trials.[16] The mechanism of DCA induced neuropathy is not well understood.[17] On the one hand in vitro work with nerves has suggested a mechanism for the neuropathic effect of DCA; with DCA showing a dose and exposure dependent demyelination of nerves (stripping of the nerve 'sheath'), which demyelination was partially reversible over time, following washout of DCA.[18] On the other hand, a review in BJC [16] states "This neurotoxicity resembled the pattern of length-dependent, axonal, sensorimotor polyneuropathy without demyelination." with regard to the 2006 study by Kaufman et al.[8]/quote]

https://en.wikipedia.org/wiki/Dichloroacetic_acid

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