Neurobiologix have gone to great lengths to ensure customer satisfaction in every way. Their quality standards ensure that if you find something listed on the label, you will also find it in their physician designed vitamin. That is a guarantee! When it comes to quality the manufacturing standards can vary from one company to another. Food Grade simply means a product meets the standards for human consumption. Physician Designed actually meets physician designed standards. A Physician Designed vitamin and or supplement must be in excess of 99% purity. This means there are no binders, fillers, dyes, or unknown substances. That is what is offered at Neurobiologix.