I've just completed another round of DMSA chelation for Lead, Cadmium, Antimony & Arsenic using 12.5mg of DMSA every 4 hours for 3 days. I always feel worse during the chelation: foggy brain, extra tired, crap for memory. But when I go through the rest period for 3 days, my memory is clearer and my face is less swollen. My eyelids don't droop as much. I'm also using Transfer Factors for Epstein-Barr virus and Cytomegalo virus. I'm hoping that I can remove enough Lead (Lead weakens the immune system) so that my body will take care of the viruses on its own.