Detox reaction or bad reaction?

I have taken regular vitamin C in the past with no effects, so I tried buffered vitamin C and got severe acidic diarrhea and burning pains in the abdomen. Was this a detox reaction do you think? I was surprised that I reacted this way as I read that buffeted vitamin C is supposed to be gentler on the stomach. In posting in this forum because I know that some people use vitamin c as a Bowel Cleanse detox, so I thought someone with experience might know if I experienced a detox reaction or simply a bad reaction. I took two 500mg capsules and started having diarrhea the same day for five days. I have adrenal fatigue/chronic fatigue and dyspepsia btw.
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