I am living proof of this...I could not understand why I felt so terrible taking bio-acidophilus and Threelac (and I am not talking die-off here) and over 2 years I have tried 3 times. I have not tried Kefir but that would have been next on the list.. Then I found http://www.badbugs.org
and read that many people with parasites such as Dientamoeba fragilis and Blastocytis Hominis could not take probiotics as parasites feed on parasites/bacteria (as well as sugar/carbs). It seemed to make sense.
I tested positive to DF and made an informed decision to go down the antibiotic route. I took Iodoquinol and Doxycycline for 3 weeks. I experienced massive fatigue but loose BM's improved within days. Then I got extreme bloating and constipation (something new to me). I had 3 sessions of colonics
and each time the colonist exclaimed how much candida was in me (colour/bubbles). Before medication I had several sessions of colonics
and candida had not been this huge issue. Well,I guess it was to be expected after that large dose of antibiotics. Since medication, I was taking Grapefruit Seed extract daily which was killing the candida
I was scared to take bio-acidophilus incase I had a negative reaction. I was told if I reacted badly to it I could still have parasites. For 3/4 months I tried to cure constipation with countless tablespoons of extra virgin olive oil and eating beetroot with every meal (to good effect). Drank lots of water.
Then I started to take bio-acidophilus. Brilliant! Started to do normal BM's 2 even 3 times a day. Smell normal/texture normal. That was a month ago. What is really interesting is that I drink less water now (?) so clearly what goes on inside you is a mysterious process. I have to add that I drink/eat fresh coconuts which I find really energising but even the fibre in the coconut flesh didn't help with constipation. And as for psyllium husk! Terrible congestion!
PS now I would like to try Kefir/coconut milk