Possibly. Kalcker pursued CDS in order to avoid the acidic nature of MMS. Same active ingredient without the acidity. It's not much acid in three drops or so of MMS per dose, but he reports some people react due to its acidic nature. If you are currently taking MMS and have no issues, by all means keep taking it.
So if you already have acid issues, this will make it worse?
Possibly. Kalcker pursued CDS in order to avoid the acidic nature of MMS. Same active ingredient without the acidity. It's not much acid in three drops or so of MMS per dose, but he reports some people react due to its acidic nature. If you are currently taking MMS and have no issues, by all means keep taking it.