Is Selen useful for Abnehmen?

The question of whether selenium aids weight loss lacks strong scientific support. Selenium is an essential trace mineral critical for thyroid function and antioxidant defense. Adequate selenium levels support the conversion of T4 to active T3, which can modestly influence basal metabolic rate. However, no robust clinical trials demonstrate a direct weight-reducing effect of selenium. In selenium-replete individuals, supplementation offers no benefit and may cause toxicity above 400 µg/day, leading to selenosis (garlic breath, hair loss, neuropathy). The evidence is best described as mechanistic to unclear. For weight loss, the focus should remain on caloric deficit, physical activity, and overall diet quality rather than single micronutrients. A selenium test (blood or DNA) may be useful if deficiency is suspected, but selenium should not be marketed as a weight-loss aid.