After I read the attached study on the post-biotic, Lactobacillus gasseri CP2305, I purchased this product on Amazon: It's called Enzymedica Subculture Probiotics, contains 20mg of the correct L. gasseri strain, CP2305 - and you take one capsule per day. My oldest daughter, my husband and I have taken L. gasseri for about two weeks - and all of us have experienced dramatic improvements in our sleep.

https://www.sciencedirect.com/science/article/pii/S1756464617300543