Copper can be a two edged sword but we may have concentrated our interest in excessive copper.  Listen to this interview with Dr. Kirby Hotchner on the subject of deficiency and the corresponding problem of iron overload. Unfortunately, copper deficiency is sometimes interpreted as an iron deficiency when the opposite could be true. Listen here:  https://thewellnessbydesignproject.com/2022/12/copper-deficiency-and-iron-overload/