This is one of the most potent tongkat ali products. Tongkat Ali is known to boost testosterone naturally and comes with all the benefits of higher testosterone, as compared to the younger days. You get 400mg of 50:1 extract of tongkat ali which equals to 20g of raw tongkat ali. In addition, you get 50mg of Changbai Mountain Ant and 50mg of He Shou Wu which is known to boost testosterone as well. The combination itself is very potent. In fact, I can feel the effect on first day itself. I have low testosterone levels so that might be why I can feel it almost immediately. It also feels me feel a bit hotter than normal and I made the mistake of taking it at dinner, ending up having problems falling asleep that night. When used over time, it helps to enhance bed performance too! Overall, the quality of the herbs used is highly trustable from Dragon Herbs which is recognized as the premier source for Chinese herbs in USA. The capsules are vegetarians, not large and easy to swallow. Note that tongkat ali is to be cycled 40-50% off in order to maintain the effect (for example, take 5 days, off 2 days or take 10 days, off 5 days). There are no flow agents or binders used though rice flour is used as filler. Pricewise, it is definitely expensive so there are only 100 capsules so it will last about 1 month +- but you get what you pay for. Check out my page for more reviews!rb does what it's purported to do.