Fermentation Processes in Functional Food Systems

Fermentation processes harness the metabolic activities of microbes—yeasts, bacteria and filamentous fungi—to transform raw food substrates into products with enhanced nutritional profiles, safety and sensory appeal. In functional food systems, these biotransformations yield bioactive compounds such as peptides, vitamins and exopolysaccharides that contribute to gut health, immunomodulation and nutrient bioavailability. Traditional and novel fermentations leverage lactic acid bacteria, acetic acid bacteria and mould species to degrade antinutritional factors (for example phytates and trypsin inhibitors), release bound minerals and generate antioxidative metabolites. Advances in process control, reactor design and starter culture development have enabled precision fermentations for dairy, cereal, legume and plant‐based matrices. Integration of multi-omics and systems biology approaches has begun to unravel microbial interactions, metabolic fluxes and gene networks that underpin functional traits. Scaling such processes to valorise agricultural by-products—fruit pomace, plant-based milk waste and cereal brans—promises to address sustainability and food security challenges. The global significance of functional fermentations emerges from their capacity to combine waste reduction, nutrient enrichment and consumer acceptance, thereby offering adaptable solutions for health-oriented food innovation across diverse cultural contexts.

Research from Nature Portfolio

Recent studies have employed a multi-omics framework to elucidate fungal fermentation of soymilk by-products, revealing a distinct subpopulation of Neurospora intermedia with specialised pectin and cellulose-degrading pathways. Transcriptomic and metabolomic profiling demonstrated efficient upcycling of diverse agricultural residues into a nutritious, mycotoxin-free food matrix that garnered positive consumer feedback beyond its traditional origin. These findings illustrate how molecular characterisation of non-conventional fermentative fungi can inform the development of scalable processes for converting waste streams into functional ingredients.

Research from all publishers

Investigations of naturally fermented dairy ecosystems have uncovered extensive intra-species genomic and functional diversity among lactic acid bacteria, linked to carbohydrate-active enzyme repertoires and horizontal gene transfer events. This diversity underpins flavour development and textural attributes in artisanal milk products and informs the preservation of microbial resources. Parallel work using ecological and evolutionary models has mapped microbiome assembly in surface-ripened cheese, sourdough starters and fermented vegetables, highlighting the roles of dispersal, selection and drift in shaping community composition and metabolite production. Furthermore, studies of cereal and legume fermentations have demonstrated that endogenous enzyme activation—via germination and controlled microbial growth—dramatically improves protein digestibility and mineral bioaccessibility, transforming staple substrates into value-added functional foods with enhanced health benefits.

Fermentation Processes in Functional Food Systems publication trend

The graph below shows the total number of articles in fermentation processes in functional food systems across all publications each year (not limited to Nature Index journals).

Technical terms

Fermentation: Biochemical conversion of organic substrates by microorganisms, yielding acids, gases or alcohols.

Functional food: A food that confers health benefits beyond basic nutrition, often through bioactive compounds.

Multi-omics: Integrated analysis of genomic, transcriptomic and metabolomic data to elucidate biological systems.

Microbiome: The collective community of microorganisms inhabiting a given environment, including their genes and metabolites.

Horizontal gene transfer: Movement of genetic material between organisms, enabling rapid acquisition of new functions.

References

1. Neurospora intermedia from a traditional fermented food enables waste-to-food conversion. Nature Microbiology (2024).
2. Intraspecific microdiversity and ecological drivers of lactic acid bacteria in naturally fermented milk ecosystem. Science Bulletin (2023).
3. Microbiome Assembly in Fermented Foods. Annual Review of Microbiology (2023).
4. Fermentation and germination improve nutritional value of cereals and legumes through activation of endogenous enzymes. Food Science & Nutrition (2018).