Fruits and vegetables grown today carry roughly half the nutritional value they held six decades ago, according to a new study from UK-based Deep Science Ventures.
Researchers found that American produce now lacks critical nutrients including vitamin C, calcium and iron, a decline they trace to deteriorating soil quality. The study also documented drops of 20 to 50 percent in several key nutrients across bread, cereals, apples, peas and carrots.
Will Summers, one of the report’s authors, wrote that the measurement of food security has remained fixated on calories for sixty years. “For sixty years we’ve measured food security in calories … and on those measures we’ve done remarkably well,” he wrote. “But we’ve been quietly hollowing out what’s inside our food.”
The findings mean consumers would need to eat roughly twice as much of many fruits and vegetables to obtain the same mineral levels — copper, magnesium and potassium among them — that were available in the 1960s.
Researchers reached these conclusions by analyzing historical food datasets and long-term crop archives, including wheat samples stretching back 160 years. The systematic 20 to 50 percent decline in mineral and protein density showed up consistently across these records.
The nutritional erosion has its roots in the Green Revolution of the 1960s, when agricultural systems dramatically expanded global food supplies and cereal yields. That same movement, however, prioritized volume over nutritional quality, leaving an estimated 2 billion people worldwide experiencing what researchers term “hidden hunger” — micronutrient deficiencies despite adequate calorie consumption.
The modern diet has compounded the problem. The rise of ultra-processed foods has masked the nutrient drop over the last 60 years, and per-capita calorie intake has climbed worldwide. Researchers label the resulting condition the “triple burden,” where obesity, hidden hunger and related deficiencies coexist in populations.
The economic fallout stretches into the billions. Micronutrient deficiencies cost countries up to 3 percent of GDP annually through lost productivity and healthcare burdens, the study found. The deficiencies also elevate risks for chronic disease, poor maternal health and impaired child development.
Looking forward, researchers warned that higher atmospheric carbon dioxide, widespread soil degradation and yield-focused agricultural policies threaten to deepen the nutrition crisis in coming decades.
The study proposes shifting how policymakers frame food security, moving from calorie counts to nutritional security as the core metric. Researchers also called for nationwide nutrient-monitoring networks and the expansion of farming practices that enhance soil organic matter, which they said would improve both farm profitability and crop quality.
The Green Revolution’s legacy of boosted yields came with this overlooked trade-off that now affects global public health, agricultural policy and individual dietary choices across every continent.