Hormones in the body: where they come from, and where they go to

Pyrrhus

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The main pathway for hormone production in the body is sometimes referred to as the Hypothalamic-Pituitary-Adrenal (HPA) Axis:

1) Note that the hypothalamus is at the top of the above diagram. Here is a relevant discussion:
What is the role of Hypothalamus Dysfunction in ME?
2) And note that the pituitary gland is right below it. Here is a relevant discussion:
Poll: Do you have a shrunken pituitary gland (partially empty sella) on your brain MRI?
3) Finally, note that below the pituitary gland, on the left half of the diagram, is the adrenal gland. Here is a relevant discussion:
Severe fatigue in patients with adrenal insufficiency
 

Wishful

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They list all those hormones, but T2 gets no respect. It's actually fairly important, but it gets very little research. I expect most doctors still follow the old (pre-1960's) belief that it's non-functional.

"We don't have a checkbox on the test requisition form for it, so let's just pretend that it doesn't exist." :grumpy: