Clinical Research Directory

Inclusion Criteria: * Healthy individuals who have followed a vegan, vegetarian, or omnivorous diet for at least one consecutive year * Aged between 18 and 40 years * Provision of written informed consent Exclusion Criteria: * Diagnose neurological disorders (e.g. neurodegenerative, inflammatory, autoimmune, infectious, vascular) * Eating disorders * Excessive alcohol consumption * Pregnancy * Recent moderate to severe infection (within the past 12 weeks) , including SARS-CoV-2 * Recent trauma, injury, or surgery (within the past 12 weeks) * Significant BMI fluctuations (\>5 points) within the last year * Patients who have been using Proton pump inhibitors (PPIs) for an extended period (e.g., 1 month).