Some people DO use proprietary blends as a scapegoat to hide the fact they are not giving you the proper amounts in their products but NOT ALL.. i was specifically advised by very big professionals helping me with DGA that the blend that we came up had to be protected since you CANNOT patent a blend on a supplement and the only way to do that without being directly knocked off was to do it with a proprietary blend... so there are good and bad reasons to do it.. i can personally guarantee you that dga is done with precision to ensure you get everything you are supposed to be getting with each product... the reviews out there are speaking for themselves