The phrase "chemical balance" refers to the state of equilibrium in which the concentrations of reactants and products remain constant in a chemical reaction. Full definition
Because progesterone and estrogen are necessary for chemical balance in the brain, when they drop in order to produce milk, a mother can feel the affects of sadness and depression. (romper.com)
This can happen when there's a change in the normal chemical balance of your vagina, or if you have a reaction to irritating products. (plannedparenthood.org)
The doctor can set the bone, cut out the tissue, or administer the drug, but only the mysterious life force itself can join cells back together again and restore chemical balance. (religion-online.org)