The adoption of improved crop varieties has long been a key driver of agricultural transformation in developing countries. While the existing literature has documented the achievements of the Green Revolution, an important question remains unanswered: How do agricultural technologies translate into improvements in individual nutritional outcomes? Are the nutritional benefits associated with improved wheat varieties driven by the grain itself, or by the labor savings they generate? To address this question, we construct an individual-level dataset comprising 45,278 observations from 49 counties across nine provinces in China over the period 1991–2011. Using a two-way fixed effects model, we find that the adoption of improved wheat varieties significantly increases overall nutrient intake among local residents. In particular, it leads to higher consumption of fat and protein, while having no significant effect on carbohydrate intake.Further analysis reveals that the nutritional benefits of improved wheat varieties do not primarily arise from increased agricultural output or farm income. Instead, improved varieties reduce labor requirements in agricultural production, facilitating the reallocation of agricultural labor to non-agricultural sectors. This labor reallocation, in turn, contributes to improved nutritional outcomes. These findings provide important policy implications for agricultural technology diffusion and structural transformation in developing countries. To maximize the benefits of improved seed technologies, governments should not only promote the adoption of improved varieties but also implement complementary human capital support policies that facilitate labor mobility and non-farm employment opportunities.
