From the manufacturer

Progressive Laboratories was founded in 1972 by a nutritionist passionate about serving and expanding his patients ability to optimize health. Since then, our mission has always been clearly defined: we strive to help patients maximize their potential for health through the science-based use of targeted nutraceutical products. Our mission, our passionate commitment, is to apply the growing body of nutrition science as it applies to health and wellness to produce the finest targeted nutrient and botanical formulations in the world.

To create these top-of-the-line products, we utilize the exact ingredient sources and forms applied in clinical research....