What I used was Rhodiola, not Rhiodola... I'm not sure if they are the same thing or not. Rhodiola is the root of a tree grown in cold climates.
Rhodiola rosea is considered an adaptogen, which means it works primarily as an endurance booster. Many Westerners are much more familiar with another adaptogen called Siberian ginseng. Legend has it that the Vikings routinely consumed rhodiola rosea to boost their strength while on long campaigns. Eastern Europeans and Scandinavians also benefited from the fatigue-fighting properties of rhodiola rosea. In some parts of the world, a bride was presented with a bouquet of rhodiola to symbolize the arrival of new vitality and prosperity.
I took mine in capsule form and not liquid. I would think liquid would be better. I'd be interested to know what you thought of it. I might try it again... I can always use more energy at the end of the day.