Diet does not replace medication in JIA, but it can support management by influencing inflammatory load and overall health. A Mediterranean-style pattern (vegetables, fruits, whole grains, legumes, olive oil, fish) may improve the broader inflammatory environment and cardiometabolic profile. Excessive sugar, ultra-processed foods, and energy-dense patterns can promote weight gain and behaviors associated with higher inflammatory burden. In children, the objective is not to build rigid “ban lists,” but to create a sustainable nutrition system that supports growth and development.

It is also important to recognize that restrictive diets do not affect every child in the same way. If a food appears to worsen symptoms, a structured trial under clinician/dietitian guidance is safer than uncontrolled elimination. The most rational model integrates medical therapy, appropriate physical activity, and high-quality nutrition as a combined operational strategy.