Probiotic Evidence Ledger

What specific strains have actually been studied, what they were studied for, and where the evidence stops

Walk into a pharmacy, grocery store, or aggressively beige wellness website and you will meet the same promise in different fonts:

Supports gut health.
Balances the microbiome.
Helps digestion.
Boosts immunity.
Restores your flora.

Most of those claims are too vague to mean much.

“Probiotic” is not a diagnosis, a treatment category, or a guarantee of benefit. …