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L. casei Shirota and Probiotics have at most a minor documented interaction. Choose one, and if you choose this strain use the fermented-milk format the trials used.
Redundant rather than harmful. Note the studied format is a fermented MILK DRINK — capsule and non-dairy products do not inherit that evidence — and both large trials were null on their primary endpoints.
The single most-trialled strain within a category whose evidence is usually multi-strain and heterogeneous.
What to do: Choose one, and if you choose this strain use the fermented-milk format the trials used.
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.