Once I've taken probiotics for a few months, will the positive bacteria remain in my system, or do I have to keep taking them?

I read a short blurb somewhere that our systems treat cold pro-biotic food differently than warm and that warm is better. I make my own milk kefir and use it as a base for my morning smoothie with added frozed fruit, so it's typically cold. Does anyone have thoughts or feedback about this?

Can Bacillus Coagulans be taken at the same time with different strains of probiotics?

Probiotics seemed a good idea for me but now I find that Saccharomyces is Brewer's yeast and also there is barley grass in the one I have. Since I have coeliac disease these are very bad for me. Is there an effective probiotic that has no gluten source in it?

What I have learnt so far is if you're a person with occasional bloating or gastric problems, probiotic is one way to reduce those symptoms.

For normal person, it's desirable to take probiotics after completion of anti-biotics medications.

There are dozens of Probiotic brands. I've tried several ones. To my experience, those with stomach acid resistant delivery systems are the most efficient ones.

Doesn't it depend on the specific species of bacteria resident in your probiotic source? If they are normally resident in the human gut, then it seems that they would stay. If not, then they wouldn't.

I wonder if this is true for prebiotics as well, for example after taking the recently mentioned (in the probiotics review) Bimuno and increasing Bifidobacterium levels, will they fall off if Bimuno is no longer consumed?

I always thought that the role of probiotics was to seed the gut with friendly bacteria then to eat the correct food .The bacteria would flourish and there would be no need to continue taking probiotics. if this is correct then ones diet is of extreme importance to nurture a friendly micro biome if it isn't then is there another factor which is prohibiting them colonising the gut?