Here is a study of prevalence of hormone deficiency related to TBI. Mild 17%(GCS 13–15), moderate 11%(GCS 9–12), or severe 35%(GCS 3–8).

Pituitary dysfunction following traumatic brain injury: clinical perspectives

Incidence with concussions is not part of this study.

The simple point is, yes, hormones are an issue but with only a small percent. The challenge is getting a doctor who will prescribe the tests and understand the results. One NT participant found a specialist at USC Medical Center. I don't think she needed the expensive hormones mentioned in the study listed below.

Growth hormone, if needed is $15,000 to $20,000 per year. Adrenocorticotropic hormone costs even more.

B-6 is used to help in place of adrenocorticotropic hormone.

What does the research say about the process behind head movement and symptoms?

How much did hormone therapy cost for your son?

For many, head movement appears to trigger upper neck inflammation that triggers symptoms.