Scientists create international definition for fermented food

By Nikki Hancocks contact

- Last updated on GMT

getty | tbralnina
getty | tbralnina

Related tags: Fermented foods, Probiotics, Prebiotics

A team of scientists organised by ISAPP has created the first international consensus definition for fermented foods.

The paper​, published in Nature Reviews Gastroenterology & Hepatology​, defines fermented foods as: "foods made through desired microbial growth and enzymatic conversions of food components"​.

The 13 authors, with expertise in family medicine, microbiology, food science and technology, ecology, immunology, and microbial genetics, take care to note the difference between probiotics and the live microbes associated with fermented foods. The word 'probiotic', they say, only applies in special cases where the fermented food retains live microorganisms at the time of consumption, and only when the microorganisms are defined and shown to provide a health benefit, as demonstrated in a scientific study.

"Many people think fermented foods are good for health--and that may be true, but the scientific studies required to prove it are limited and have mainly focused on certain fermented food types,"​ says first author Maria Marco, Professor in the Department of Food Science and Technology at the University of California, Davis.

Co-author Bob Hutkins, Professor in the Department of Food Science and Technology at University of Nebraska, Lincoln, who has authored a well-known academic textbook​ on fermented foods, says, "We created this definition to cover the thousands of different types of fermented foods from all over the world, as a starting point for further investigations into how these foods and their associated microbes affect human health."

The consensus panel discussion was organised by the International Scientific Association for Probiotics and Prebiotics​ (ISAPP), a non-profit organisation responsible for the published scientific consensus definitions of both probiotics​ (2014), prebiotics​ (2017) and synbiotics​ (2020).

Mary Ellen Sanders, executive science officer of ISAPP, says: "To date, different people have had different ideas of what constitutes a fermented food. The new definition provides a clear concept that can be understood by the general public, industry members and regulators."

Currently, evidence for the positive health effects of fermented foods has relied more on epidemiological and population-based studies and less on randomised controlled trials. The authors expect that, in the years ahead, scientists will undertake more hypothesis-driven research on how different fermented foods from around the globe--derived from dairy products, fruit, vegetables, grains, and even meats--affect human physiology and enhance human health.

Source: Nature

Hutkins. R., et al

"The International Scientific Association for Probiotics and Prebiotics (ISAPP) consensus statement on fermented foods"

https://doi.org/10.1038/s41575-020-00390-5

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