Probiotics vs. Prebiotics: What Your Specific Microbiome Actually Needs
Not all probiotics work for all patients. Microbiome testing makes the difference.
Probiotic efficacy is highly strain-specific, condition-specific, and individual-specific. Understanding these distinctions is essential for practitioners guiding patients through the supplement market.
What Are Probiotics?
Probiotics are live microorganisms that, when administered in adequate amounts, confer a health benefit on the host. Benefit is strain-specific, not genus- or species-level — a finding that invalidates most generic probiotic recommendations.
What Are Prebiotics?
Prebiotics are non-digestible food components that selectively stimulate the growth of beneficial gut bacteria. They include inulin, fructooligosaccharides (FOS), and resistant starch. Prebiotics feed existing beneficial populations — they are not effective if those populations are absent or severely depleted.
Why Microbiome Testing Changes Everything
Microbiome testing reveals which beneficial species are deficient, whether prebiotic substrates will be utilised, and whether specific probiotic strains are likely to colonise given the existing microbial landscape. Microbiome-informed probiotic selection moves beyond generic supplementation to targeted biological intervention.
