“…Jegatheesan et al (1) also summarize citrulline's beneficial effects, specifically in nonalcoholic fatty liver disease, and characterize this amino acid as a coin with two sides. They suggest citrulline as a marker of insulin resistance as well as an insulin-sensitizing amino acid (1). Although this is an interesting question, it was not the subject of our study and therefore could not be addressed (2).…”