What Are You Actually Swallowing When You Take Probiotics?

The article questions probiotic supplements sold in stores, noting they often contain similar strains such as lactobacilli and bifidobacteria.

It explains how these live cultures are meant to survive stomach acid and reach the gut, but the benefits are often unclear.

Many products make vague claims about gut health or microbiome support without strong evidence.

The piece also warns that high-dose probiotics can be risky for people with weakened immune systems.