Six foods were used to evaluate the interaction of dietary betaine and n-3 PUFA in the cat. There was no ingredient added to the control food to specifically increase betaine or n-3 fatty acids. The experimental design was a 3 × 2 factorial (fatty acids were varied from the control food which had no added source of n-3 fatty acids. flax was included as a source of 18 carbon n-3. https://parisnaturalfoodes.shop/product-category/mahogany-pwd/