Probiotics Basics: Beyond the Hype
Understanding CFUs, survivability, and why genus and species aren't enough.
What is a Probiotic?
The ISAPP (International Scientific Association for Probiotics and Prebiotics) defines probiotics strictly as: "Live microorganisms that, when administered in adequate amounts, confer a health benefit on the host."
This means fermented foods like kombucha or standard yogurt aren't technically probiotics unless they have a defined, quantified strain proven to have a health benefit.
The Naming Convention
| Taxonomy Level | Example | Analogy |
|---|---|---|
| Genus | Lactobacillus | Vehicle |
| Species | rhamnosus | Car |
| Strain | GG (ATCC 53103) | Honda Civic 2024 |
Clinical trials are conducted on the strain. If a product just says "Lactobacillus rhamnosus", you are buying an unknown vehicle.
Common Mistakes
- Assuming more CFUs = better: Clinical efficacy is tied to the dosage used in the trial, not maximizing numbers. 1 billion CFU of a specific strain might be effective, while 50 billion of an untested blend might do nothing.
- Ignoring survivability: Bacteria must survive stomach acid. Look for delayed-release capsules or intrinsically acid-resistant strains.
FAQ
It depends on the delivery mechanism. Standard capsules often survive better when taken with a meal (which buffers stomach acid). Enteric-coated or delayed-release capsules can often be taken empty-stomach.