Hidden Hunger: How Climate Change, Rice and Gene Editing Collide

Hunger often conjures images of an empty plate and a rumbling stomach. Yet there is another, less obvious form: plates may be full while the body remains deprived of the nutrients it needs most.

Nutritionists refer to this as hidden hunger, which results from a lack of vitamins and minerals rather than too few calories.

More than two billion people are affected, equivalent to around a quarter of the world’s population.

Over half of people worldwide do not get enough vitamins B2, B9, C and E, or minerals including calcium, iron and iodine. This shortfall is not confined to lower-income countries; it is equally apparent in affluent nations.

The situation is made more unusual by the fact that the worsening deficiency has little to do with individual dietary decisions. Instead, the cause lies within crops themselves, as they are altered by an increasingly warm atmosphere.

Rice has a nutrition problem

Among the world’s principal staple crops, cooked white rice provides the lowest level of nutrients, sitting well behind both maize and wheat.

This matters greatly because rice is still the most important everyday calorie source for billions of people.

Throughout much of Asia, someone may consume three generous plates of rice each day yet still fail to meet recommended levels of essential vitamins and minerals. Although the grain satisfies hunger, normal serving sizes cannot fill the nutritional gap it leaves behind.

Climate change is worsening an already serious issue. Rising atmospheric carbon dioxide reduces the amount of protein, B vitamins and minerals that grains can retain.

By 2050, the continuing fall in rice quality could leave a further 239 million people deficient in folate.

They would add to the 2.5 billion people who already do not consume sufficient folate, a B vitamin that the body cannot manage without.

Vitamins that protect plants

A wide-ranging new review highlights an important and unexpected connection.

Mustafa Bulut of the Leibniz Institute of Plant Biochemistry (IPB) and fellow researchers point to the striking overlap between the nutrients that sustain human health and those that help plants survive.

The vitamins needed by people are also among those plants use to withstand harsh conditions.

Crops given thiamine, or vitamin B1, cope significantly better with drought than untreated plants.

Folic acid and riboflavin likewise enable plants to endure periods without rain and saline soils that might otherwise limit their growth. As a result, a crop developed to contain more nutrients may also be better equipped to weather a difficult growing season.

This shared role means climate change strikes the food system twice. It reduces the nutrient content of crops while simultaneously exposing the fields that produce them to greater drought, heat and flooding.

The limits of crossbreeding

For much of the previous century, plant breeding focused above all on maximising yields.

The Green Revolution during the 1960s achieved this aim, doubling wheat, rice and maize harvests across Asia.

These increased yields are credited with preventing starvation for more than one billion people. However, the drive for greater volume also gradually reduced the nutritional quality of crops grown by farmers.

Traditional crossbreeding can raise levels of a small number of nutrients, as shown with iron and zinc in bean and wheat varieties. However, it cannot introduce a vitamin that a plant’s genetic makeup was never able to produce.

It is also an exceptionally slow process. Bringing one improved variety from development to a farmer’s field may take between eight and 15 years, while hunger seldom allows such time.

What gene editing adds

More recent technologies overcome several of these longstanding barriers simultaneously. They work much faster than crossbreeding and offer a degree of accuracy that conventional methods cannot achieve.

The best-known genetically engineered crop is Golden Rice, whose grains have a pale golden colour because they contain provitamin A. It was developed to tackle childhood blindness caused by vitamin A deficiency in parts of Asia.

CRISPR-based editing delivers even greater precision. Rather than relying on chance, it can alter a single selected gene.

One CRISPR-edited rice line already contains higher levels of iron and zinc in its grains. A new variety created with this method can be ready within only two to six years, a fraction of the time still required by older approaches.

Europe gives gene editing room

For many years, strict rules severely limited these technologies, especially in Europe. Securing approval to grow a genetically modified plant could readily take over a decade.

This obstacle started to change in June 2026, when the European Parliament adopted revised rules that handle many gene-edited crops in the same manner as conventionally bred varieties.

“This is a great opportunity to accelerate the development of biofortified crops and effectively combat hidden hunger,” said Bulut.

The revised framework applies to targeted changes that could also have arisen through natural mutations or standard breeding. It creates a much shorter route for crops designed to provide nutrients lacking in people’s diets.

One approach is not enough

No individual tool can eliminate hidden hunger alone, so the review argues that these methods should be used together.

Conventional breeding continues to enjoy wide public confidence, whereas gene editing offers the speed and scope that slower crossbreeding cannot match.

Each promising variety must first be developed in a laboratory, then withstand years of field trials before it can feed even one family.

Maintaining this lengthy process requires reliable, long-term investment that does not disappear between election cycles.

The aim has never been to create one ideal super-crop for worldwide cultivation. Instead, it is to secure a wider range of more nutrient-dense crops that can remain resilient as the climate becomes more severe.