What to watch with Zink and fatigue?

When considering zinc for fatigue, caution is warranted. Zinc is crucial for immune function and energy metabolism, but excessive intake can induce copper deficiency, leading to anemia and worsened fatigue. The recommended daily allowance is 8–11 mg for adults; doses above 40 mg/day should only be taken short-term under medical supervision. Taking zinc on an empty stomach may cause nausea. Conversely, zinc deficiency (e.g., due to gut disorders) can itself cause fatigue. A blood test is advisable before supplementation, as excess zinc often does more harm than good. Evidence for zinc improving fatigue without proven deficiency is weak.