Introduction: Betaine (trimethyl glycine) is known as methyl group donor and antioxidant in previous reports. The aim of this study was to assess the antioxidant effects of betaine in Indomethacin-induced gastric damages. Methods: Thirty-two adult male Sprague–Dawley rats in an experimental study were divided into four equal groups as follow: Control. Indomethacin. https://parisnaturalfoodes.shop/product-category/ester-c-500mg-orange/