Which product is more effective, the capsules or the powder?

This is dependent on the benefits you are looking for. All CocoaVia™ 500mg Cocoa Flavanols Powder are guaranteed to contain 500 mg of cocoa flavanols per serving, and 750 mg for the Ultra capsules. At the 500mg level there are cardiovascular benefits including but not limited to increasing blood flow, keeping arteries flexible, and maintaining healthy blood pressure and cholesterol levels. At the 750mg level you experience all the benefits of 500mg with added benefits such as experiencing benefits faster and improving 3 types of memory (word recall, spatial memory, long-term memory).