In the past, several measuring methods were used to quantify PAC (proanthocyanidins) in cranberry supplements. However, these methods factored in additional compounds within the cranberry. Scientific and government agencies sought for one validated and standardized measuring method and agreed on the DMAC/A2 assay method (dimethylamino/cinnamaldehyde), developed by Brunswick Laboratories, Southborough, MA. See the story at dmac-asso.org¹.
Measured by DMAC/A2, other cranberry products show an average range of 2 to 5 mg of PAC, if any at all. ellura alone contains 36 mg of PAC in a one a day capsule and is proven to protect against harmful bacteria that cause UTIs.
1"The dosage of cranberry proanthocyanidins (PACs) in food supplements: challenges and latest developments" by G. Haesaerts in: Phytothérapie (France), Springer-Verlag, August 2010. The BL-DMAC method was published in 2010 after an international lab validation backed by the US cranberry industry, the Cranberry Marketing Committee of the USA (who financed the study) and the Cranberry Institute.