Anger to a human reflects many biochemical changes within your metabolism.

Pain can also cause biochemical changes in your body that tend to keep the pain going.

The new study found modest evidence of the biochemical changes.

Consider the biochemical and physiological changes that are required to exercise efficiently.

The biochemical changes occurring in the brain with Parkinson's disease can lead to depression.

"The headaches result from real biochemical changes in the brain."

That could be a clue to biochemical changes in the brain.

The question of the scale of any possible biochemical changes was (and is even now) a serious one.

Acute stress can cause biochemical changes that trigger heart attacks, for example.

Its effects may include physiological responses, central nervous system reactions, and biochemical changes.