Biotics — whether prebiotics, probiotics, or postbiotics — are at the core of nutritional and therapeutic strategies aimed at preserving or restoring gut microbiota balance. However, with increasing regulatory requirements (EFSA, FDA) and growing market competition, it is crucial to demonstrate their efficacy through robust scientific evidence.

A biotic’s value lies in its ability to interact with both the microbiota and the host. Studying the microbiota helps to:

- Identify potential probiotic strains (isolated from healthy microbiota)

- Validate target effects (restoration of diversity, activation of beneficial metabolic functions)

- Provide scientific evidence supporting product benefits, aligned with regulatory expectations

Probiotic efficacy can be assessed at two levels:

- Clinically , through measurable outcomes in subjects (e.g., digestion, immunity, inflammation, etc)

- Biologically, through microbiota analyses showing structural or functional changes after administration

Targeted or whole-metagenome sequencing (First Res & Full Reveal) approaches help demonstrate these modifications in in vitro, in vivo, or clinical studies.

The impact of a biotic can be evaluated by analyzing:

- The microbial species composition (microbiota structure)

- The associated genes and biological functions (e.g., SCFA production, inflammation regulation)

These insights are obtained using metagenomics, for species and encoded functions and metatranscriptomic, for functions actually expressed in the microbiome (Activ'Reveal).

Yes with strain-specific tools such as qPCR (iQuant), it is possible to:

- Detect a target strain within a complex microbial community

- Quantify its relative abundance

- Distinguish between live and dead cells (using PMA treatment)

This is essential for verifying probiotic persistence in the microbiota and for quality control in finished products.

 

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