Focus on prolactin as a metabolic hormone: Trends in Endocrinology & Metabolism Current Insights in Prolactin Signaling and Ovulatory Function The Involvement of Prolactin in Stress Related Disorders Prolactin Releasing Peptide Contributes to Stress Related Mood Disorders and Inhibits Sleep Mood Regulatory Melanin Concentrating Hormone Neurons in Rats Journal of Neuroscience Training hard but getting smaller? That's not a discipline problem. It's a signal problem. After 30, growth hormone drops ~14% per decade. And it doesn't just affect muscle Recovery slows Comparison of the Effects of Ketamine and Memantine on Prolactin and Cortisol Release in Men: A Randomized, Double blind, Placebo controlled Trial Neuropsychopharmacology