Progressive Research Labs (PRL) pioneered dietary supplements for Diabetics. PRL has focused their research in the area of Diabetes, Hypoglycemia and the related complications such as retinopathy, macular degeneration, neuropathy, depression and cardiovascular health. PRL products are recommended as "Essential" in two best selling books; "Prescriptions for Nutritional Healing" by Balch & Balch page 229, and "the Diabetic Male's Essential Guide to Living Well" by Dr. Joseph Juliano MD.