Dr K. M. George

Secretary-General, Global Millets Foundation (GMF); Chief Executive Officer, Sustainable Development Forum (SDF)

Former United Nations Professional and Asian Development Bank Expert

Corresponding author e-mail: melmana@gmail.com  |  Telephone: +91 9947670887

Abstract

Millets — a botanically diverse group of small-seeded, drought-hardy grasses that include sorghum, pearl millet, finger millet, foxtail millet, proso millet, barnyard millet and kodo millet — are re-emerging as strategic crops for sustainable agriculture, environmental resilience and public health. This paper draws together the agronomic, nutritional and clinical evidence on millets, with particular attention to their therapeutic relevance for lifestyle diseases such as type 2 diabetes, cardiovascular disease, hypertension, obesity and coeliac disease. The evidence shows that millets combine a low glycaemic index, high dietary fibre, favourable lipid-modulating and anti-inflammatory phytochemistry, and an exceptional tolerance of drought and heat that requires far less water than rice or wheat. Together these properties make millets a practical, low-cost intervention for both climate adaptation and non-communicable disease prevention, particularly across the arid and semi-arid tropics of Asia and Africa. The paper closes with ten policy recommendations addressed to national governments, public-health authorities and the international wellness community, aimed at mainstreaming millets within food-security and preventive-health strategy.

Keywords: Millets; sustainable agriculture; food security; climate resilience; non-communicable disease; glycaemic index; nutraceuticals; lifestyle disease; public health policy.

1. Introduction

Millets have sustained human populations across the semi-arid tropics of Asia and Africa for more than four millennia, and remain the staple diet of an estimated 1.2 billion people today. For much of the twentieth century they were relegated to the status of a ‘coarse grain’, displaced from mainstream cultivation and diets by the cereal-intensification drive of the Green Revolution. That position is now changing. Mounting concern over climate change, water scarcity and soil degradation has coincided with a second, equally pressing crisis: non-communicable disease, principally cardiovascular disease, type 2 diabetes and cancer, which together now account for roughly seven in every ten deaths worldwide (2), with diet ranking among the most significant and most modifiable of the underlying risk factors.

The world’s population is expected to approach 9.7 billion by 2050, intensifying pressure on food systems already strained by climatic volatility (15). Within this dual crisis of planetary and metabolic health, millets present an unusually direct convergence of solutions: a crop family that is simultaneously climate-resilient, input-efficient, and clinically shown to improve glycaemic, lipid and weight-related markers of lifestyle disease. It was this convergence that led the United Nations, at India’s initiative, to designate 2023 the International Year of Millets, and it is this convergence that this paper sets out to examine in full: first the agronomic and environmental case for millets, then the clinical evidence for their therapeutic role, and finally the policy steps needed to move millets from the margins of the global food system to its centre (14).

2. Agronomic Advantages of Millets

Millets owe their resilience to a distinctive physiology. As C4 plants, they use a photosynthetic pathway that concentrates carbon dioxide around the primary carboxylating enzyme, giving them markedly better water-use efficiency and heat tolerance than the rice- and wheat-type C3 pathway. Their short stature, small leaf area, thickened cell walls and deep, dense root systems reinforce this drought tolerance at the whole-plant level. Pearl millet, the most widely cultivated species, needs only around 300–400 millimetres of water between sowing and maturity, against the 1,000 millimetres or more that rice typically requires (13).

These traits let millets be grown reliably on marginal and degraded land — soils that are saline, aluminium-toxic or simply too poor to support conventional cereals — and their short growing cycle of roughly sixty to a hundred days allows multiple cropping and intercropping within a single season, providing a buffer against erratic rainfall (9,13). Several millet species also tolerate waterlogging better than rice or wheat, and their association with nitrogen-fixing soil microbiota reduces the need for synthetic fertiliser. Collectively, these characteristics make millets one of the more dependable options available to rain-fed and dryland farmers, particularly across sub-Saharan Africa and peninsular India, where climate volatility is already reshaping cropping decisions (14).

3. Nutritional Composition and Profile

Millets are often called ‘Nutri-cereals’ in the scientific literature, and the description is earned. A typical whole grain provides 7–12% protein, 2–5% fat, 60–75% carbohydrate and 15–20% dietary fibre, alongside substantial calcium, iron, magnesium, phosphorus, zinc and B-vitamins; finger millet alone supplies around 300–350 milligrams of calcium per 100 grams, among the highest of any cereal (9).

Their defining nutritional feature, however, is a low-to-intermediate glycaemic index. A meta-analysis covering 111 observations across 39 studies put the mean glycaemic index of millets at 52.7 — some 36% below milled rice (71.7) and refined wheat (74.2) — a difference attributable to their high resistant starch, slowly digestible starch, fibre and protein content, all of which slow the release of glucose into the bloodstream (3). Millets are additionally rich in phenolic compounds, including ferulic and sinapic acids, flavonoids, tannins and phytosterols, which underpin much of the therapeutic evidence discussed in Section 5 (9,10). And every true millet species is naturally free of gluten, a point of considerable dietary significance for people living with coeliac disease or gluten sensitivity (11).

4. Environmental Sustainability and Climate Resilience

The environmental argument for millets rests squarely on their resource efficiency. Producing a single kilogram of millet requires roughly 200–300 litres of water, a fraction of what rice cultivation demands — a direct consequence of the C4 pathway and root architecture described above (13). Because millets need little irrigation, fertiliser or mechanised input, their carbon footprint across the production cycle is correspondingly modest, and their tolerance of poor soils reduces pressure to bring virgin or forested land under the plough (13,14).

These qualities have led international bodies to treat millets as a meaningful contribution to the United Nations Sustainable Development Goals, in particular SDG 2 on zero hunger and SDG 13 on climate action. Yet the global area under millet cultivation has fallen by roughly 31% since 1961, even as yields have improved through varietal advances — a trend that reflects continuing policy and consumer preference for input-intensive staple cereals rather than any agronomic shortcoming in millets themselves (14).

5. Therapeutic Applications in Lifestyle (Non-Communicable) Diseases

The clinical case for millets has strengthened considerably over the past five years, and is organised below by condition.

5.1 Type 2 Diabetes Mellitus and Glycaemic Control

The evidence here is the most robust of any reviewed in this paper. A systematic review and meta-analysis spanning 65 studies and roughly 1,000 participants across eleven countries found that regular millet consumption lowered fasting blood glucose by up to 12% and post-prandial blood glucose by up to 15% in people with diabetes, with glycated haemoglobin falling from a mean of 6.65% to 5.67% among pre-diabetic participants — a shift large enough, in many cases, to move a person from pre-diabetic back to normal glycaemic status (3). A further difference-in-differences analysis confirmed significant reductions in both fasting and post-prandial glucose when millet diets were compared directly against major staple-cereal diets (4). A randomised controlled trial has since extended this finding to gestational diabetes, showing that daily millet intake improved glycaemic control among affected women (5). The mechanism is now reasonably well understood: high resistant starch and fibre slow gastric emptying and glucose absorption, while the protein fraction appears to enhance insulin sensitivity.

5.2 Cardiovascular Disease, Dyslipidaemia and Hypertension

Millets also show a consistent lipid-modulating effect. Intervention studies collated in a systematic review found that millet consumption returned total cholesterol and triacylglycerol to normal reference ranges, raised HDL cholesterol by roughly 6%, and lowered systolic and diastolic blood pressure by 4–5% (7). A comparative meta-analysis against rice, wheat and quinoa reported significant reductions in total cholesterol, triacylglycerol and very-low-density lipoprotein cholesterol, alongside a favourable rise in HDL-C (6), while other clinical data point to average falls of around 8% in total cholesterol and 10% in LDL cholesterol with regular millet-based diets (9). Part of the explanation lies in millet phenolics — phytosterols and policosanols that inhibit cholesterol synthesis and bile-acid reabsorption — and part in the anti-inflammatory action these compounds exert on the macrophage-driven foam-cell formation that underlies atherosclerotic plaque (8). Separately, the potassium and magnesium content of millet grain supports vasodilation and helps counter the hypertensive effect of dietary sodium.

5.3 Obesity and Weight Management

The same fibre- and starch-driven satiety that benefits glycaemic control also assists weight management: meta-analyses report reductions in body mass index of roughly 7–10% associated with regular millet consumption, alongside the lipid improvements described above (6,7). Proanthocyanidins concentrated in the bran and outer husk appear to reinforce this effect by promoting satiety and moderating fat accumulation (10). Given the close pathophysiological relationship between obesity, insulin resistance and dyslipidaemia, the combined evidence across Sections 5.1 to 5.3 suggests a coherent role for millets within multi-component interventions for metabolic syndrome, rather than a benefit confined to any single condition.

5.4 Coeliac Disease and Gluten-Related Disorders

Every principal millet species is naturally free of the gliadin and glutenin proteins responsible for coeliac disease, and immunochemical studies of sorghum-derived foods have confirmed both the absence of toxic gliadin-like protein and the clinical safety of millet-based products for coeliac patients (11). Millets also offer a nutritional advantage over the refined rice flour and tapioca starch typically used in commercial gluten-free products, retaining a fibre, mineral and phytochemical profile that those substitutes generally lack (9,11).

5.5 Gut Microbiome and Anti-Inflammatory Effects

A newer strand of evidence points to a prebiotic role for millet fibre and resistant starch, fermented by colonic bacteria into short-chain fatty acids that support gut-barrier integrity and a healthier microbial community (12). Millet bran phenolics have also been shown, in experimental studies, to suppress pro-inflammatory cytokine signalling and to modulate the NF-κB pathway implicated in both cardiovascular and colorectal disease risk (8,12). This strand of the evidence is younger than the diabetes and cardiovascular literature and would benefit from confirmation in larger human cohorts, but it points in a consistent direction with the rest of the therapeutic evidence reviewed here.

6. Contribution to Global Food Security

Global millet production stood at roughly 30.8 million tonnes in 2023, with India contributing an estimated 38–41% of world output, followed by Niger, China, Nigeria and Mali (15). India alone produced 18.02 million tonnes in 2024–25 across some 13.8 million hectares, and developing countries account for around 97% of global production, with millets serving as a primary dietary staple across the semi-arid tropics of Africa and Asia (14,15).

Diversifying staple food sources through millets offers a practical route to stronger food sovereignty for smallholder farmers in drought-prone regions, particularly as global millet demand is projected to rise from 48.5 to 66.5 million tonnes between 2030 and 2050, with supply in parts of Asia expected to fall short absent further investment (14). Yet millets remain thinly traded — under 3% of global grain trade — and are frequently absent from the safety nets that matter most: in India, millets accounted for only 2% of grain distributed under the National Food Security Act as of 2022–23, against more than 93% for rice and wheat combined (14).

7. Policy Framework and Global Initiatives

The policy architecture supporting millets has strengthened markedly over the past decade. India declared 2018 its own National Year of Millets and subsequently proposed the United Nations designation of 2023 as the International Year of Millets, formally adopted by the UN General Assembly and championed by the Food and Agriculture Organization (14). Within India, cultivation is now supported through the National Food Security and Nutrition Mission, a Price Support Scheme guaranteeing minimum prices to millet farmers, and pilot integration of millets into school-feeding and child-nutrition programmes. The global millet market, valued at roughly US$12.06 billion in 2025, is projected to grow at close to 4.6% annually to reach US$15.10 billion by 2030 (14) — but converting this momentum into public-health impact will require the more deliberate policy action set out in Section 9.

8. Challenges and Future Prospects

The barriers to wider adoption are practical rather than scientific. Consumer taste preferences, shaped by decades of rice- and wheat-centred diets, remain a real constraint, as does the longer preparation time associated with traditional millet processing and a general lack of awareness — among consumers and clinicians alike — of the grain’s therapeutic properties. Processing infrastructure lags well behind that available for rice and wheat: dehulling and milling technology suited to the diverse morphology of different millet species is not yet available at scale in most producing regions (14). Smallholder farmers, particularly across sub-Saharan Africa, also face thin formal markets and weak aggregation infrastructure, which depress farm-gate returns even where demand exists. None of these barriers is intractable, but none will resolve itself without deliberate policy intervention, which is the subject of the recommendations that follow.

9. Policy Recommendations

The evidence reviewed in this paper points to ten concrete actions for national governments, public-health authorities and the international wellness and nutrition community. They are offered not as an exhaustive programme but as a practical starting point for mainstreaming millets within food-security and preventive-health strategy.

1. Integrate millets into national food-security safety nets. Governments should include millets, alongside rice and wheat, within public distribution systems, food-ration schemes and emergency food reserves, correcting the near-total dependence on two staple cereals evident in several national programmes today.
2. Embed millets in school-feeding and maternal-nutrition programmes. Health and education ministries should scale up pilot integration of millets into school meals, anganwadi and early-childhood nutrition schemes, given the grain’s relevance to childhood metabolic health and micronutrient adequacy.
3. Issue clinical dietary guidance on millets for lifestyle-disease management. National diabetes and cardiovascular associations, and primary-care bodies more broadly, should incorporate millet-based dietary options into formal management guidelines for type 2 diabetes, dyslipidaemiaand hypertension, reflecting the clinical evidence summarised in Section 5.
4. Invest in processing and value-addition infrastructure. Governments and development finance institutions should fund small- and medium-scale dehulling, milling and fortification facilities in millet-growing regions, the single largest practical constraint on wider consumption identified in this paper.
5. Support smallholder farmers through price and procurement guarantees. Minimum support price mechanisms and formal procurement guarantees, of the kind already operating in India, should be extended to other major millet-producing countries, particularly across the Sahel, to protect farm-gate incomes and encourage cultivation.
6. Fund public awareness and consumer-education campaigns. Health ministries and wellness organisations should run sustained public-education campaigns explaining the glycaemic, cardiovascular and gluten-free benefits of millets, targeting both the general population and healthcare professionals, whose own awareness of the evidence remains inconsistent.
7. Prioritise research funding for climate-resilient millet breeding. Agricultural research bodies should maintain and expand investment in millet breeding programmes aimed at improving yield, shelf-life and processing quality, without eroding the drought and heat tolerance that make the crop valuable in the first place.
8. Commission larger, longer-duration human clinical trials. The wellness and academic-medicine community should prioritise adequately powered, longer-term randomised trials on millets and cardiovascular, gut-health and colorectal outcomes, where the current evidence base, though promising, remains thinner than that for diabetes.
9. Facilitate international trade and market access for millet-producing countries. Trade ministries and multilateral bodies should simplify quality and import standards for millet products, recognising their comparatively low share of global grain trade relative to production, so that smallholder producers can access premium export markets, including the growing gluten-free and functional-food sectors.
10. Establish a standing international millets and wellness advisory platform. Building on the momentum of the International Year of Millets, the wellness and public-health community should establish a permanent, cross-country advisory platform linking agricultural policy, clinical nutrition and food-industry stakeholders, ensuring the evidence base continues to inform practice well beyond any single commemorative year.
11. Conclusion

Millets occupy a distinctive position at the intersection of climate adaptation, food security and non-communicable disease prevention. Their agronomic resilience makes them a strategically valuable crop for a warming and increasingly water-stressed world, while the clinical evidence reviewed here demonstrates measurable, mechanistically plausible benefits across type 2 diabetes, cardiovascular disease, hypertension, obesity, coeliac disease and gut health — a rare instance of a single dietary and agricultural intervention serving both planetary and human health at once. Realising that potential will depend less on further proof of concept than on the deliberate, coordinated policy action set out in Section 9. With that commitment, millets can make a substantive and lasting contribution to global food security and to reducing the burden of lifestyle disease in the decades ahead.

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K.M. GEORGE Ph.D.

 

Secretary General of  Global Millets  Foundation &  President  of  Sustainable Development Forum

 

(Formerly Chief of  Monitoring and Evaluation , Government of Papua New Guinea; World Bank Monitoring & Evaluation Advisor to Govt. of Afghanistan; FAO Team Leader in Afghanistan; Consultant to ADB, UNDP, UNOPS, UNWOMEN — in Rwanda, South Sudan and  North Korea)