<unk> , or hypocupremia, is defined either as insufficient<unk>  to meet the needs of the body, or as a serum<unk>  level below the normal range. The neurodegenerative syndrome of<unk>  has been recognized for some time in ruminant animals, in which it is commonly known as "swayback".<unk>  can manifest in parallel with vitamin B12 and other nutritional deficiencies.
Copper deficiency
Boron deficiency 
Fluorine deficiency
Copper toxicity
Biotin deficiency
Selenium deficiency
Zinc toxicity
Zinc deficiency