Nature's Way Rhodiola Rosea is an adaptogenic herb used to increase your stamina and resistance to physically and mentally challenging circumstances. Rhodiola is used in a similar manner to other adaptogens like ginseng or eleuthero, and while it can increase your sense of energy, rhodiola is stimulant-free, so don't expect a caffeine-like effect. Rather, rhodiola works by raising your fatigue threshold, so you can do more and stay focused longer before calling it a day. Interest in rhodiola has exploded and many companies have rushed rhodiola products to market to cash in on this interest. But buyer beware: the quality of rhodiola products is extremely variable. The raw materials market for rhodiola is saturated with low-quality Chinese product whereas high-quality product has been notoriously hard for brands to source on an ongoing basis. This is the main reason behind the occasional "I tried rhodiola and it didn't do anything" experience.
So when it comes to rhodiola, stick with a brand that knows herb supplements. Nature's Way Rhodiola Rosea is a good choice since they not only know herbs, Nature's Way specializes in high-quality herb supplements, it's about the only thing they do. Take one capsule twice a day or two capsules twice a day for stronger effects.