Testosterone
hypogonadism, male
"I'm only 26 but was at the low normal range and exhibiting every symptom of low testosterone. It runs in my family on my father's side unfortunately. 

Within a week of taking it all of my mood returned to normal,  I'm no longer sleeping more than 7 hours and feeling well rested. I have a ton more self control and can easily diet and exercise. It gave me my life back basically.

Only side effect I have is raging a lot but it's manageable, especially since I have a punching bag here."