Plant-based meat alternatives cut land use and emissions but raise micronutrient risks

Plant-based meat alternatives (PBMAs) could deliver substantial environmental gains for the global food system, but only at a nutritional cost that grows the wider the substitution becomes, according to a new modelling study published in Nature Food on 21 October 2026.

Researchers led by Junqi Xiong and Zhaowu Yu integrated PBMAs into a land-use model to assess how their adoption would affect nutrition, greenhouse gas emissions and overall food system sustainability. The work, published in Nature Food, is among the efforts to quantify what happens when foods designed to mimic the sensory properties of meat are scaled up as substitutes for animal-sourced protein.

The modelled results suggest that PBMA adoption would substantially reduce agricultural land expansion and cut greenhouse gas emissions from the agriculture, forestry and other land use (AFOLU) sector. At the same time, the simulations indicate that PBMA diets would increase the risk of micronutrient inadequacy, a trade-off the authors highlight as a central challenge for dietary transitions.

A key finding concerns diminishing marginal returns. Across regions, the study projects that each additional layer of substitution brings progressively smaller benefits. Replacing ruminant meat alone achieved nearly half of the potential emission reductions while incurring relatively small nutritional costs, according to the abstract.

By contrast, broader substitution of livestock products delivered additional environmental benefits but markedly increased micronutrient deficiencies in the modelled scenarios. This pattern suggests that the environmental and nutritional consequences of PBMA adoption depend heavily on which animal products are replaced and how far the substitution is pushed.

The study also examined regional variation. Projected changes in micronutrient intake, bioavailable nutrient contents and global inadequacy, as well as regional emission–nutrition trade-offs towards 2100, feature among the paper’s analyses, indicating that outcomes differ across world regions rather than being uniform.

The authors frame their findings as a warning against assuming that plant-based alternatives are an unqualified sustainability win. Because the nutritional penalties grow with the breadth of substitution, the timing and composition of PBMA reformulation matter: improved formulations could, in principle, narrow the micronutrient gap identified in the modelling.

According to the paper, targeted policy support, sustainable land management and improved PBMA formulations will be essential to ensure equitable dietary transitions and progress towards global climate and sustainability goals. The study is a model-based projection of future scenarios rather than an observation of realised outcomes, so its findings describe potential effects under the assumptions built into the land-use model.

As debates over the role of novel plant-based foods in climate policy continue, the research adds a quantitative dimension: the environmental case for PBMAs appears strongest when they replace ruminant meat specifically, while pushing them to displace livestock products more broadly may carry nutritional costs that policy and product design would need to address.

Subject of Research: Modelling the effects of plant-based meat alternative adoption on land use, greenhouse gas emissions and nutrition

Article Title: Plant-based meat alternatives can support reductions in agricultural land expansion and greenhouse gas emissions but entail micronutrient trade-offs

Article References: Xiong, J., Yu, Z., Gong, Y., Feng, L., Zhuang, M., Kang, D., Ou, Y., Ma, W., Hu, Y., Yang, W., Zhang, Y., & Shindell, D. (2026). Plant-based meat alternatives can support reductions in agricultural land expansion and greenhouse gas emissions but entail micronutrient trade-offs. Nature Food. https://doi.org/10.1038/s43016-026-01447-5

Image Credits: AI Generated

DOI: 10.1038/s43016-026-01447-5

Keywords: plant-based meat alternatives, land use, greenhouse gas emissions, micronutrients, food systems, dietary transition, sustainability, nutrition security, AFOLU emissions, livestock substitution, Plant-based, meat