customprobiotics D-lactate free formula is a good place to start.
Also avoid L.Acidophilus (now also known as L. Gasseri). That species is known to product D form lactic acid
If taking Activia B.Regularis works for you then it means that u need more B strains (large intestines) and not L strains (small intestines).
What's the reason to your recommendation on customprobiotics D-lactate free formula?
If you have a research or other serious document relating to L.acidophilus I'd like to read it. What are the implications of producing D form lactic acid? I think that because many processes have more than one direction of effect, it's essential to consider the chances to and implications for possible positive reactions versus negative ones when we use external treatments.