Zinc plasma is a measurement that is closely correlated to biochemistry, and more specifically brain chemistry. Functional levels of zinc, along with a copper/zinc ratio, are frequently performed as markers for specific neuro activity.
Zinc plasma is also used to monitor exposure to zinc; evaluate suspected nutritional inadequacy, especially in enteral or parental nutrition, critically ill or burn patients; cases of diabetes or delayed wound healing; growth retardation; follow therapy.
” There are about 10 different approaches for measuring zinc status, and plasma testing has consistently been regarded by zinc experts as the best way to obtain meaningful results. The zinc concentration in blood serum is nearly identical, but this approach involves a greater likelihood of contamination during sampling.”
– William J. Walsh PhD., Nutrient Power: Heal your Biochemistry and Heal your Brain