1. What data in particular will be shared?
   Response - Individual participant data that underlie the results reported in this article, after de-identification (text, tables, figures, and appendices).
   


2. What additional supporting information will be shared?
   Response - None of the above
   
   
3. Who will be able to view these files?
   Response - Researchers whose proposed use of the data has been approved by an independent review committee identified for this purpose.
   


4. For what types of analyses will this data be available?
   Response - For individual participant data meta-analysis.
   


5. By what mechanism will data be made available?
   Response - Proposals should be directed to [dr.anuradha.khadilkar@hcjmri.org.in].
   


6. For how long will this data be available start date provided 01-03-2028 and end date provided 30-06-2030?
   Response - Beginning 9 months and ending 36 months following article publication.
   


7. Any URL or additional information regarding plan/policy for sharing IPD? 
   Additional Information - NIL

This study explores links between dietary patterns, carbon footprint, and metabolic health in adults from rural and urban Maharashtra. Objectives are to compare dietary carbon footprint and metabolic health between groups, assess associations between footprint and metabolic indices, develop an e-training module on sustainable diets, and evaluate its impact on knowledge, attitudes, practices, and footprint.

The study has two components: a cross-sectional survey and a pilot intervention. The baseline survey will include 850 adults aged 20–40 years (425 rural, 425 urban) selected randomly. Data will include demographics, lifestyle, anthropometry, blood parameters, and diet assessed through food frequency questionnaire and 24-hour recall. Dietary carbon footprint will be estimated using reported intake and emission factors, expressed in kg CO2e. Statistical analysis in SPSS will compare rural and urban groups and test associations using correlations, regression, and significance at p<0.05.

In the pilot intervention, 100 participants with high dietary carbon footprint will be randomized into intervention (50) and control groups (50). The intervention will consist of an online e-learning module developed in two parts: (1) awareness and concepts of sustainable diets and (2) practical strategies to reduce carbon footprint, with content adapted from reliable sources and reviewed by experts. Delivered through multimedia formats, the module aims to enhance knowledge and promote sustainable dietary practices, while the control group will receive a generic leaflet. Pre- and post-assessments will measure changes in dietary behaviour and footprint. Data will be analyzed using paired and independent tests, with ANCOVA to adjust for baseline.

This study aims to provide evidence to guide sustainable diet promotion for health and climate benefits.