Dietary supplement based on butyric acid and vitamin D3. Butyric acid, produced naturally by the intestinal microbiota, helps to improve intestinal homeostasis, being essential for the proper functioning of energy metabolism. With immunomodulatory and antioxidant properties, it helps to enhance the activity of macrophages and inhibits histone deacetylases (HDAC). Its presentation in gastroresistant capsules helps to reach the distal sections of the digestive tract.