Evidence check: Selen in the context of Blutzucker

The relationship between selenium and blood sugar regulation is not clearly established. Selenium is an essential trace element that acts as a cofactor for selenoproteins (e.g., glutathione peroxidases) with antioxidant functions and influences thyroid hormone metabolism – both of which can indirectly affect glucose homeostasis. Observational studies suggest a U-shaped association: both low and high selenium levels have been linked to increased diabetes risk. The SELECT trial (2009) reported a modest increase in type 2 diabetes incidence among men taking selenium supplements. Mechanistically, excess selenium may impair insulin signaling and promote insulin resistance. However, the evidence is largely based on epidemiological data and post-hoc analyses; robust randomized controlled trials with glucose endpoints are lacking. For individuals without proven deficiency, selenium supplementation is not recommended for blood sugar control. If deficiency is suspected (e.g., in malabsorption), a physician should assess status. MyBody-X tests can measure selenium levels, but interpretation regarding blood sugar must be cautious. Conclusion: selenium is not a validated tool for glycemic management; a balanced diet (e.g., Brazil nuts, fish) typically meets requirements.