Also known as oligomeric proanthocyanidins (OPCs), have been clinically shown to be very effective in the prevention of urinary tract infections. The other benefits include such as anti-mutagenic activity, prevention of cardiovascular diseases, stabilization of collagen and maintenance of elastin, etc. Currently, there are several methods being used to measure levels of proanthocyanidins, like the Porter Assay, HPLC, LC-MS/MS, Total Polyphenolics and Gel Permeation Chromatography. But all the methods are either not reliable or do not meet the industry quick and inexpensive requirement. Recently, Brunswick Laboratories, a world-leading institute in natural product chemistry, developed and published a peer-validated BL-DMAC method which can produce consistent and reliable results. The method is now available for our customers.