Can Zink help with blood sugar?

Zinc plays a role in insulin metabolism and may support insulin sensitivity. Some human studies suggest a positive effect in people with prediabetes or type 2 diabetes, especially when combined with other micronutrients. However, the evidence is moderate: meta-analyses show small to moderate effects on fasting glucose and HbA1c, but studies are heterogeneous and often use low doses or short durations. Zinc deficiency can impair glucose tolerance, but in well-nourished individuals, additional supplementation usually provides no clinically relevant benefit. Consumer tests like the Hormon & VitalCheck für Frauen measure HbA1c but not zinc directly. A DNA test for zinc transporter genes (e.g., SLC30A8) has weak predictive value. Bottom line: zinc can be useful if deficiency is confirmed or as part of a holistic approach, but it does not replace medical care. Caution against overdosing (max 25 mg/day).