I don't know exactly how this works, but it does seem to make a significant difference to my energy levels. Hubs takes it too and I swear it is similarly helping him also. We are extremely busy clinicians, in stressful jobs and when I add this to my water during the day, I absolutely notice a difference. Even if it's placebo, who cares?! Seems expensive, until you feel the benefit - then it seems cheap! A little goes a long way and I will say that I think you need to still do all the right things to take care of yourself. It's not a miracle cure, but I love and recommend it. I really like the taste, helps me drink my recommended daily litres water, which I usually struggle with. However, I can imagine the taste would put some folks off though...But I find it kind of zesty, weird and nice at the same time!