A new scientific review has highlighted the importance of food-processing techniques in improving the nutritional potential of millets by reducing compounds that can interfere with nutrient absorption.

Published on November 4, 2026, in the peer-reviewed journal Discover Food, the review titled Antinutritional Factors in Millets and Their Reduction Strategies Through Processing examines different methods used to modify the nutritional and functional properties of millet grains.

The study was authored by Parashuram Patroti, Mahesh Mohan Shinde, Nishant Kumar, Payal Kardikar and Priya Ayyar.

Millets are widely recognised for their nutritional composition, which includes dietary fibre, proteins, minerals, vitamins and various plant compounds. Their ability to grow under challenging environmental conditions also makes them important crops for agricultural diversification.

However, the researchers explain that millets contain naturally occurring compounds known as antinutritional factors, which may reduce the availability or digestibility of certain nutrients.

These include phytic acid, tannins, oxalates, saponins and enzyme inhibitors.

Phytic acid can bind minerals such as iron and zinc, potentially limiting their absorption during digestion.

Certain tannins may also interact with proteins and digestive enzymes, affecting how nutrients are utilised.

The presence of these compounds does not mean millets are inherently unhealthy. Their nutritional effects depend on the compound, its concentration, the overall diet and the processing methods used.

The review examines conventional approaches that can reduce antinutritional factors through mechanisms such as leaching, enzymatic degradation and heat-induced changes.

Water-based treatments can help remove some soluble compounds, while enzymatic processes can break down specific antinutritional molecules.

Thermal processing may alter heat-sensitive compounds, although the effectiveness of a treatment depends on temperature, duration and the characteristics of the grain.

Alongside conventional processing, the researchers explore advanced technologies that may offer additional opportunities for millet food production.

These include cold plasma, pulsed electric fields, ohmic heating, irradiation, high-pressure processing, ultrasound-assisted treatments and enzyme-assisted processing.

Such methods are being investigated for their ability to modify grain components, improve processing efficiency and reduce selected antinutritional compounds.

The review emphasises the potential importance of these technologies for improving mineral bioavailability and protein digestibility in millet-based products.

For food manufacturers, the findings highlight the need to consider nutritional quality alongside texture, flavour, processing efficiency and product stability.

Reducing antinutritional factors is not simply a matter of removing as many plant compounds as possible. Some compounds, including certain polyphenols, may also have beneficial biological properties.

Processing decisions therefore require a balance between reducing undesirable interactions and retaining valuable nutrients and bioactive compounds.

The research provides an overview of existing scientific evidence rather than reporting a new clinical trial.

Consequently, it does not establish that any particular processed millet product produces a measurable improvement in human health.

Further research is needed to determine how different processing combinations affect nutrient absorption under real dietary conditions and whether laboratory findings translate into practical benefits for consumers.

For the global millet industry, the review offers useful guidance for developing processing strategies that preserve the value of traditional grains while improving their suitability for modern food applications.

The findings reinforce an important principle: the nutritional value of millet foods depends not only on the grain itself, but also on how it is processed and prepared.