My husband is 41 and has been noticing for a year or so certain symptoms. He was tested and is really low in testosterone and a bit low in thyroid. He had taken some supplements to help (can't remember what it was now, but it had several things mixed in, including Tribulus). It made him agitated, angry and quick-tempered. Once we realized it, he stopped taking it and returned to normal. I honestly don't know the first thing to do to help him, I just know I want to go the natural route. I didn't see a thread on here about this, but if there is one, please direct me there! Thank you!