Clinical Research Directory

Inclusion Criteria: * Adult patients: aged 18-80 years; * Clinical diagnosis of PsA meeting the CASPAR classification criteria; * Low disease activity (4 \< DAPSA ≤ 14) at the time of recruitment; * Under stable pharmacological treatment with disease-modifying antirheumatic drugs (DMARDs) (conventional synthetic, targeted synthetic, or biological); * Disease duration \> 6 months; * Absence of metabolic diseases. Exclusion Criteria: * BMI ≥ 27 kg/m²; * Current or desired pregnancies (confirmed by pregnancy test); * Disease activity in remission (DAPSA ≤ 4), moderate (14 \< DAPSA ≤ 28), or high (DAPSA \> 28) at the time of recruitment; * Pediatric onset of the disease (\< 16 years); * Patients on a vegan, ketogenic, or MCT-rich diet (containing MCT in supplement form or high amounts of palm or coconut oil); * Presence of ketoacidosis/metabolic acidosis, decompensated liver cirrhosis, or medium-chain acyl-CoA dehydrogenase (MCAD) deficiency; * Type 2 diabetes, cardiovascular diseases, hypertension, ischemic diseases, renal failure, malignant tumors, respiratory diseases, dyslipidemia, fibromyalgia, metabolic syndrome; * Major depression; * Gastritis, esophagitis, reflux syndrome, chronic inflammatory bowel diseases (IBD); * Lactose intolerance.