TL;DR: New York City menus linked lower emissions to plant-forward standards without nutrition loss.

TL;DR: Menus served under New York City's 2022 revised food standards were associated with 21% lower greenhouse gas emissions per portion and an estimated 0.64 kilograms less carbon dioxide equivalent per portion, with nutrition content generally consistent.

In 2022, New York City revised standards for meals and snacks served in public schools, hospitals, and other programs, according to The Vegetarian Resource Group Blog. The revised standards called for reduced use of red and processed meat and cheese and greater use of whole or minimally-processed plant protein, according to the same blog summary. The revisions were done to promote better individual, community, and environmental health, according to that summary.

The association between the revised standards and menu emissions was quantified in a study published in May 2026 in Health Affairs, volume 45, issue number 5, pages 585-593, according to the Johns Hopkins University publication record. The nine-page paper was authored by E. R. H. Moore, Alyssa J. Moran, Laura Stadler, Elizabeth Solomon, Sonia Y. Angell, and Roni A. Neff, according to that record. The digital identifier for the paper is https://doi.org/10.1377/hlthaff.2025.01669, according to the same record.

A 2008 policy revised in 2022

In 2008, New York City established nutrition standards for food purchased and served by city agencies, according to the Johns Hopkins University publication record. In 2022, it revised the standards to limit meat and increase plant-based options, according to that record. The 2022 revision addressed meals and snacks served in public schools, hospitals, and other programs, according to The Vegetarian Resource Group Blog.

Local policy makers increasingly have implemented nutrition standards for municipal programs to advance population health and climate change goals, according to the Johns Hopkins University publication record. Yet little is known about the impact of these policies, according to that record. The New York City analysis was designed to examine both entrée offerings and the greenhouse gas and nutrition content associated with total menu offerings, according to that record.

Which meals were studied

The study used menu data from four agencies that serve 77% of all city meals, according to both the Johns Hopkins University publication record and The Vegetarian Resource Group Blog. The four agencies were public schools, NYC Health + Hospitals, the Department of Corrections, and the Administration for Children's Services, according to The Vegetarian Resource Group Blog.

Researchers compared menus in the period before the revised standards were enacted and the period when the standards were in effect, according to The Vegetarian Resource Group Blog. The examination covered fiscal year 2019 through fiscal year 2024, according to the Johns Hopkins University publication record. Researchers evaluated changes in the center-of-the-plate protein source, according to The Vegetarian Resource Group Blog.

The nutrient and emissions review looked beyond entrées alone. Researchers examined nutrient content and estimated greenhouse gas emissions based on entrées, side dishes, and beverages, according to The Vegetarian Resource Group Blog. That approach allowed comparison of total menu offerings before and after the new standards, according to the same blog account.

What changed on the plate

All agencies reduced the frequency of beef entrées offered on menus and increased the frequency of vegetarian entrées, according to the Johns Hopkins University publication record. In most agencies there was an increased use of whole or minimally processed plant proteins, according to The Vegetarian Resource Group Blog.

The largest reduction in beef servings was seen in preK-8 schools, which had a 17% reduction in beef, according to The Vegetarian Resource Group Blog. The NYC Health + Hospitals acute care meal program had the largest increase in vegetarian food items, described as a 52% increase, according to the same blog summary. Those agency-level shifts occurred within the broader move away from red and processed meat and cheese toward whole or minimally-processed plant protein, according to that summary.

Emissions fell per portion served

The main finding was that, overall, greenhouse gas emissions decreased by 21% per portion with the revision in standards to promote greater use of whole or minimally-processed plant protein in place of red and processed meat, according to The Vegetarian Resource Group Blog. Changes in total menu offerings were associated with an estimated reduction of 0.64 kilograms of carbon dioxide equivalent in greenhouse gas emissions per portion across all agencies and programs, according to the Johns Hopkins University publication record.

The estimated greenhouse gas emissions included production and processing but did not include transportation, serving, and waste from served food that was not eaten, according to The Vegetarian Resource Group Blog. The results reflect the menus that were served, not necessarily what was eaten, according to that summary. That distinction matters for interpretation because the study measured offerings on menus rather than plate waste or individual intake, according to the same description of methods.

Nutrition content held steady

There was no statistically significant change in the nutrient content of total menu offerings when the menus from before and after the new standards were compared, according to The Vegetarian Resource Group Blog. The nutrition content generally remained consistent across all agencies and programs over the study period, according to the Johns Hopkins University publication record.

These findings suggest that municipal food standards can support greenhouse gas reductions without compromising nutrition, according to the Johns Hopkins University publication record. The results suggest that menu changes that increase the use of whole or minimally-processed plant protein can result in a sizeable reduction in greenhouse gas emissions with little effect on the nutritional quality of the menus, according to The Vegetarian Resource Group Blog.

How researchers framed the model

The authors framed the work as relevant beyond New York City. The findings offer a model for other jurisdictions seeking to advance both population and environmental health goals, according to the Johns Hopkins University publication record.

The policy context described in the blog summary connects purchasing rules to health aims at more than one level. The 2022 standards revisions were done to promote better individual, community, and environmental health, according to The Vegetarian Resource Group Blog. The revised standards called for reduced use of red and processed meat and cheese alongside greater use of whole or minimally-processed plant protein, according to that summary.

For readers tracking municipal food policy, the timeline is 2008 for establishment, 2022 for revision toward limiting meat and increasing plant-based options, and fiscal year 2019 through fiscal year 2024 for the menu comparison, according to the Johns Hopkins University publication record. The agencies in the comparison together account for 77% of all city meals, according to both the university record and the blog summary. The published analysis appears as a nine-page article in Health Affairs, volume 45, issue 5, in May 2026, according to the university record.

What the scope does and does not show

The emissions estimate covers entrées, side dishes, and beverages as offered, according to The Vegetarian Resource Group Blog. Production and processing were included in the estimate, according to that summary. Transportation, serving, and waste from served food that was not eaten were not included, according to that summary.

Nutrient content was assessed for total menu offerings, not for a single entrée in isolation, according to the description in The Vegetarian Resource Group Blog. The comparison was between menus from before the new standards and menus from after the new standards, according to that description. No statistically significant change was found in that total-offering comparison, according to the same description.

The center-of-the-plate protein evaluation documented less frequent beef entrées in every agency and more frequent vegetarian entrées in every agency, according to the Johns Hopkins University publication record. PreK-8 schools recorded the 17% beef reduction highlighted in the blog summary, while the acute care program at NYC Health + Hospitals recorded the 52% vegetarian increase, according to that summary.

Sources referenced