Used to evaluate the levels of MSH in the blood. MSH is an anti-inflammatory, regulatory hormone made in the hypothalamus. It controls production of hormones, modulates the immune system and controls nerve function, too. It is made when leptin is able to activate its receptor in the proopio-melanocortin (POMC) pathway. Specimen Plasma with Trasylol®, frozen Volume 2 mL Minimum Volume 0.3 mL Container Lavender-top (EDTA) tube Please see Resources for additional collection requirements.