Plain and simple, not all products are created equal. The New York Times conducted a study with many of the major retailers such as but not limited to Wal Mart, Target, Walgreens & GNC. What they found was up to 5 out of 6 products had little or none of the main ingredients listed. In place was merely fillers. For complete article CLICK HERE: 

Here at Prospero Nutrition we only emphasize on "Exclusive Professional Formulas," that cannot be found in your major box retailers and online platforms (eBAY, Amazon, etc). They can only be purchased through approved licensed healthcare professionals. This allows us to monitor the environment and manner in which the products are handled and cared for. In doing so, you are provided products with highest quality and efficacy.