I tried 2 bottles of this extract and did not really notice that large of an increase in mental alertness. I really like the concept of herbal extraction there are some nice benefits but also some limitations to liquid extractions but that is a different discussion. I just could be a nonresponder to this product but unfortunately I will not be purchasing it again after giving it what I consider to be a decent try.

Been taking this for about six weeks. Energy is more consistent and I feel less sluggish in the afternoons. Happy with the purchase.

It's fine. Did what I expected, nothing more. Might try other brands before reordering.

Works well. Deducting a star because the bottle is hard to open with one hand, but the product itself is solid.

Good quality supplement. About three weeks in and noticing a difference, mostly in energy levels.

Third-party tested, clean label. That's what I look for first. Actually works too, which is a bonus.