Supplement Insider Evidence-based wellness
Health goals /Gut health

Gut health

Probiotic evidence is strain-specific, which means a product naming only the species — "contains Lactobacillus" — is telling you almost nothing.

9
ingredients reviewed
2
we'd consider
3
we'd skip

Before you buy anything

Read the strain code

L. rhamnosus GG is evidence. "Lactobacillus blend" is not.

Match strain to condition

A strain trialled for antibiotic diarrhoea says nothing about IBS.

Fibre before probiotics

Psyllium is cheaper, better studied, and helps more people.

We don't sell one of these

We make no formula for gut health. Nothing on this page earns us anything — which is worth knowing when you read the pages where we do have something to sell.

What we do sell How we stay honest