Zinc Monotherapy Increases Serum Brain-Derived Neurotrophic Factor (BDNF) Levels and Decreases Depressive Symptoms in Overweight or Obese Subjects: A Double-Blind, Randomized, Placebo-Controlled Trial
This 2015 double-blind, randomized, placebo-controlled trial investigated the effects of zinc monotherapy on depressive symptoms and serum BDNF levels in overweight or obese individuals. Fifty participants were randomized to receive either 30 mg of elemental zinc daily or a placebo for 12 weeks. The study found that zinc supplementation significantly