To your knowledge, are the authors of the linked study affiliated with a supplement manufacturer?
I understand it is intended to aid sleep and it does seem to do that for me, but it is also purported to raise free testosterone levels by as much as 30%. This study seems to indicate that is not the case.
I'm just wondering. I've spent money on "hot" supplements before only to find out later their claims were bunk and any potential benefit I felt was just a placebo effect.
I just don't want to take an expensive multi vitamin.
Do you know of any further studies?