Anorexia Nervosa is a eating disorder which refers to one’s excessive restriction of food intake which results to several health disparities such as malnutrition and starvation. Those suffering from Anorexia Nervosa are usually underweight and possess a relatively low Body Mass Index (“Anorexia Nervosa Center.”, 2018). According to the National Eating Disorder Association (NEDA, 2014) in the United States, around 70 million individuals worldwide suffer from eating disorders. According to Hofmann (2014), CBT is plausibly the most conventional form of psychotherapy. CBT is a treatment that involves therapy sessions that focuses on the normalization and fixing of one’s thoughts and eating behaviors (Hofmann et al., 2014). This essay will comprehensively examine the effectiveness of CBT treatment as a diagnosis to Anorexia Nervosa in adults by critically evaluating the advantages and disadvantages.The CBT treatment is believed to be the most effective diagnosis to this disorder in adults as it reforms one’s thoughts and beliefs that cause one’s repulsion towards food intake. According to a research conducted by Danielsen and his colleagues (2016), there is a link between anorexia and the presence of anxiety and depression. The CBT treatment has two primary goals – first is to normalize one’s eating pattern, and the second is therapeutic alliance, which, refers to the shaping and reforming of one’s psychological behaviour. However, this treatment is not as simple as that. According to Brown (2014), the CBT treatment, if primarily focused at reforming one’s psychological disorder using therapeutic alliance, instead of normalizing one’s eating patterns, impedes the success and effectiveness of the treatment. It is said that clinicians often focus too much on healing one’s mental health which hinders the anorexic to recover and attain normal eating behaviours and attain normal body weights. This brings about the complication of performing CBT as a treatment to Anorexia; Its effectivity depends on the method the therapist chooses to treat the patient Brown (2014). Additionally, it has been found that numerous patients receive suboptimal treatments which, is highly due to lack of necessary training of the therapists (Murphy et al., 2010). Therefore, it is said that clinicians ought to prioritise changing one’s eating patterns than fixing one’s psychological problems as the misfocus on such would affect the overall efficacy of the CBT treatment (Brown et al., 2014). Contingent on the proper execution of CBT, it has been found that 60% of patients who have undergone CBT have positive outcomes (Murphy et al., 2010). Given that anxiety and depression plays a role on the presence of Anorexia, it may not be suitable for all anorexics especially those who have severe mental health issues which, will require a different process to ensure effectiveness. Lockwood (2010) states that patients who suffer from increased and acute levels of anxiety require a different approach in treating Anorexia specifically, primarily addressing the treatment of anxiety before tackling the change of the eating pattern. Additionally, the CBT treatment, involving therapy sessions, would need full compliance and cooperation of the patient. Without such, the success of the treatment may be impeded. Dropout rates of patients undergoing the CBT treatment have been reported to hover around 36-37% (Danielsen et al., 2016). Additionally, it has been found that majority of the dropouts were associated with greater levels of anxiety (Fernandez et al., 2015). In a study conducted by Otte (2011), it was suggested that pharmacological treatment, along with CBT, would increase the overall efficacy of treating patients with Anorexia who suffer from elevated levels of anxiety. With regard to relapse rates, 65% of adult patients who have undergone the CBT treatment have not relapsed after a year since its last therapy. Which, is said to higher than any other treatment. Furthermore, it was found that patients who received the CBT were more likely to have improved by long-term follow up at post treatment compared to interpersonal psychotherapy (IPT), but not as commonly as specialist supportive clinical management (SSCM) (Carter et al., 2011). Additionally, researchers (Legenbauer et al., 2015) argue that there are several studies that report a relapse rate of 85% and higher in adolescents when reassessed 2-7 years after the treatment, which, may be due to a different effectivity on adolescents. The information on the effectivity of the CBT on adolescents is insufficient to make a claim regarding its efficacy as only a few studies have been made on the effect of the CBT treatment on adolescents (Legenbauer et al., 2015). According to Oakes(2014), it has been found that patients who have undergone CBT had greater progress and less relapse rates than those treated with nutritional counseling. Furthermore, extrapolating from Hofmann’s meta-analytical review on the efficacy of CBT on eating disorders, it has also been found that the CBT treatment yielded relatively higher remission rates than that of any other psychotherapy for treating Anorexia (Hofmann et al., 2014). Contingent on the proper execution of CBT, the treatment it is arguably a strong, effective, and viable treatment to Anorexia. However, studies suggest that there is still a need for improvement in the treatment. The compatibility of the treatment with its patient is crucial to the effectiveness of CBT. Additional research is required to examine the efficacy of CBT treatment on different age groups, specifically children and adolescents who suffer from Anorexia Nervosa. This essay critically evaluated the effectiveness of CBT treatment on adults with Anorexia with the use of different studies, research journals, and review of related literature.