This trial will compare a plant-based Indo Mediterranean diet, a non vegetarian Indo Mediterranean diet, and a routine diet for 4 weeks in healthy Indian adults to evaluate effects on stress, sleep quality, anthropometry, and lipid profile. It is a randomized, triple arm, parallel group, equal allocation of 78 participants into three groups of 26 each. Where the participants will be recruited from communities in karnataka.

Based on inclusion criteria age 18 to 45 years, BMI less than or equal to 24.9 kg per meter square, males and females, willing to follow assigned diet for 4 weeks and exclusion criteria Systemic illness, pregnant or lactating, acute infection within past 2 weeks, strict vegans or unwilling to adhere to allocation.

Interventions

Group 1: Plant-based Indo Mediterranean diet emphasizing whole grains, millets, legumes, vegetables, fruits, nuts, seeds, cold pressed oils

Group 2: Non-vegetarian Indo-Mediterranean diet with Group 1 base plus lean animal proteins as egg whites, skinless chicken, fish such as sardines or mackerel or rohu or catla and avoidance of red or processed meats.

Group 3: Routine diet

The data will be collected at baseline and after 4 weeks of intervention. Anthropometry will be done by using height, weight, hip and waist circumference measured by measuring tape and standard calibrated weighing scale. For serum lipid profile 10 ml fasting blood will be collected in aseptic condition in the morning then it will be sent for analysis in NABL accredited laboratory. For stress and sleep quality the PSS 10 and PQSI questionnaires will be administered.

After the data collection all data will be entered in ms excel then it will be processed and later analysed in Jamovi software using appropriate tests.