Evidence check: Selen in the context of weight loss

Selenium is an essential trace mineral important for thyroid function and antioxidant defense. Some studies suggest that optimal selenium status may support metabolism, especially in individuals with thyroid disorders or selenium deficiency. However, there is no strong evidence that selenium supplementation directly leads to weight loss. Most effects are indirect and depend on baseline status. Over-supplementation can be toxic (selenosis). Therefore, supplementation without prior blood testing is not recommended. The evidence level is human-moderate, as there are observational studies and small interventions, but no large RCTs with weight loss as a primary endpoint. At MyBody-X, selenium is included in nutrient analyses but not promoted as a standalone weight-loss tool.