The bacteria populations in our gut are regulated by the pH (acid-alkaline balance)which, in turn, depends on the efficacy of digestion and foods consumed. A toxic, waste-filled intestinal terrain will attract bacteria whose job it is to decompose the waste. And so, there is little value for those bacteria that aid the digestive process. Bacteria that ferment and putrefy foods are in a greater demand than the probiotic, beneficial bacteria when, for example, you eat cadaver foods such as meat, fish, chicken, etc., or you drink alcohol or soft drinks, or when bile secretions are not sufficient to sustain a clean intestinal environment.

I hesitate to recommend someone to ingest probiotic bacteria to quell the symptoms of digestive dysfunction when the root cause for this issue is elsehwere. You may end up just creating billions of dead bacteria corpses per day when you introduce probiotic bacteria into a hostile, acidic, congested environment. All these dead bacteria have to be removed somehow...

Cleansing the colon (colonic irrigation, colemas, oxypoweder or oxyflush, etc.) and the liver bile ducts (see The Amazing Liver & Gallbladder Flush), and eating foods that suit your body type needs (see Timeless Secrets of health & Rejuvenation) appears to make more sense, at least to me and to many others who choose that route. It is always better to cleanse the body first, before introducing supplements of that nature. The appendix is the main breeding place for beneficial bacteria in the colon. If the appendix has been removed, this may warrant the use of some probiotic supplements as long as one regularly cleanses the colon, more often than would otherwise be necessary. Past use of antibiotics are the commonest cause of destroying the beneficial bacteria population. One course of the drugs can wipe out these microbes for several years, unless cleansing of the liver and intestines along with dietary/lifestyle changes correct this imbalance.

It is always better to set the preconditions for the body to produce its own enzymes, medicines, bacteria, etc. than to introduce them from the outside. You can never do it as well as the body does, and you also don't want to become dependant on them.

Andreas

At http://www.living-foods.com/recipes/rejuvelac.html =
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Rejuvelac
from Ann Wigmore Institute Kitchen.
Mary Forest Finnell, ND,. MH, LMT,

2 cups soft wheat berries

1.Soak in purified water 8 hrs or overnight.
2.Drain, rinse, then allow to sprout for 2 days, without rinsing.
3. When white sprout tails begin to show, add 6 cups purified
water, cover jar with cheesecloth, put in a warm place
where it can be exposed to at least 70 degree temp for
2 days.
4. THEN pour off, drink or refriderate or use "rejuvelac" in a recipe.
5. The leftover seeds can be used one more time, with 4c. purified water, will culture in 1 day. Then seeds can be composted, or thrown to birds.

Caveats- do not drink soak water. Seeds Must sprout.
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My comment - this rejuvelac feeds your benefecial bacteria.
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A google search with keywords sauerkraut + flora turned up = http://www.bbc.co.uk/dna/h2g2/A164558

Sauerkraut is the product of the lactic fermentation of white cabbages. This natural process is regulated only by the addition of kitchen-salt, and the result is a food rich in vitamins. Sauerkraut also strengthens the bacterial flora of the digestive system, thus helping to remove bacteria and pathological viruses.
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Make your own sauerkraut = http://cecommerce.uwex.edu/pdfs/B2087.PDF
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Also miso, and pickles feed your internal flora. Hope this helps. :-)!