Endometriosis is an inflammatory pathology characterized by the growth of endometrial tissue outside the uterus, resulting in chronic pelvic pain and infertility. As a result, it has been observed that diet can influence the pathophysiology of this disease by attenuating the inflammatory environment. In this context, this study aims to summarize the influence of diet as a complementary therapy for endometriosis. To this end, a narrative review was carried out using the BVS, Embase, and Cochrane databases, including articles available in full in Portuguese, English, and Spanish published in the last 5 years. According to the literature, a diet can have pro-inflammatory properties in patients with endometriosis, such as a diet rich in saturated fatty acids, and anti-inflammatory properties, involving polyunsaturated fatty acids, in order to influence the metabolism of prostaglandins. It is concluded that endometriosis is a chronic inflammatory disease that can be modulated with the adoption of anti-inflammatory dietary habits that can impact women’s quality of life in the long term.