Complex sentence: There are many health claims associated with benefits with the gastrointestinal microbial flora, ability to reduce stress, prevent bladder infections, and much more; however, the amount of scientific studies done on fermented teas is very low.
Split into simpler sentences: There are many health claims associated with gastrointestinal microflora, reduce stress, prevent bladder infections, and much more. The amount of scientific studies done on fermented teas is very low.