Hi, how much do you take? and how often do you take it? It's really easy to get gut problems when you chelate, but also it may have something to do with the DMSA itself.

I find I have to be very careful with it and usually can only take about 25 mg of DMSA, every 4 hours around the clock. Also have to follow a candida diet at the sametime. If i don't, I get into big problems.