This document discusses how concussions can cause brain injuries and long-term health issues by impacting hormone production in the hypothalamus, pituitary gland, and adrenal glands. Specifically, it notes that concussions have been associated with illnesses like Alzheimer's, Parkinson's, and depression. The key to recovery is restoring hormone levels like human growth hormone, cortisol, and thyroid hormones to their pre-injury levels through testing done at 3 and 12 months post-injury.