Copper dysregulation may play a role in ALS progression, particularly for the form caused by SOD1 mutations. Given the complexity of this problem, simple copper supplements are unlikely to be useful to PALS with normal serum copper levels. We do not recommend using these. CuATSM, on the other hand, has more promising potential mechanisms of action, and several positive pre-clinical studies in mutant SOD1 ALS models. There are even a small number of PALS reporting benefits from it, though in our opinion the described benefits are thus far of uncertain clinical significance. At this time, the safety of repeated doses of CuATSM is unknown, as is the optimum daily dose, and it appears to be very expensive. Until trials clarify dosing and safety, as well as effectiveness in patients with and without SOD1 mutations, we do not recommend using CuATSM for ALS.
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