Organic gardening in sandy soils can lead to zinc deficiency in plants as well as poor plant growth and yields. There are special populations who may be zinc deficient. Pregnant and breast feeding women, post-menopausal women on calcium supplements, long distance runners on low protein diets are all at risk for zinc deficiency. Discuss any possible deficiency with your doctor. Be sure to tell your healthcare provider if you are taking any kind of supplement or herbal remedy.
Excess zinc is suspect in liver disease.
Copper is vital for liver functions. If we do not balance zinc with copper and other metals, it can interfere with the ability of the liver to function. Excess zinc can worsen liver conditions where copper is poorly absorbed. Excess zinc actually suppresses the immune system. While it is important at certain stages of the healing process, zinc actually impedes healing if it is introduced at the wrong stage.