Sugar substitue????
So you have used erythritol and had a problem with it? I am surprised. You are the first person I've met who has had a problem with it.
From wikipedia:
Erythritol and human digestion
In the body, most of the erythritol is absorbed into the bloodstream in the small intestine, and then for the most part excreted unchanged in the urine. About 10% enters the colon.[5] Because 90% of erythritol is absorbed before it enters the large intestine, it does not normally cause laxative effects, as are often experienced after consumption of other sugar alcohols (such as xylitol and maltitol).[6][edit] Side effects
Doses over 50g (my note: That is almost 2 oz., more than yi would ever ingest at one time) can cause a significant increase in nausea and borborygmi,[4] and (rarely) erythritol can cause allergic urticaria.[7]
In general, erythritol is free of side-effects in regular use. Erythritol, when compared with other sugar alcohols, is also much more difficult for intestinal bacteria to digest, so it is less likely to cause gas or bloating than other polyols,[8] such as maltitol, sorbitol, or lactitol.