UNIVERSITY OF CALIFORNIA, DAVIS - Puroast
[Pages:1]UNIVERSITY OF CALIFORNIA, DAVIS
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COLLEGE OF AGRICULTURAL AND ENVIRONMENTAL SCIENCES
AGRICULTURAL EXPERIMENT STATION (530) 752-1142 FAX: (530) 752-3394
DEPARTMENT OF ENVIRONMENTAL ONE SHIELDS AVENUE DAVIS_ CALIFORNIA 95616-R5RR
TOXICOLOGY
July 24, 2013
Mr. Kerry Sachs PUROAST COFFEE CO., INC. PO BOX 1291 Woodland, CA 95776
Dear Kerry:
I am writing to report on research at our laboratories that has analyzed the comparative antioxidant and pH values of various commercial coffee and tea products, including Puroast? Coffee, The rationale for gathering this data is to determine relative acid level and antioxidant value, and whether such differences, if any, relate to rclasting methodology.
Our analyses reveal that Puroast? Coffee has on average approximately 5.4 times more relative antioxidant value in comparison to the other le ading coffee brands tested. The research also shows that coffee products tested have on average approximately 1.8 times the antioxidant value of the various green tea products analyzed, with Puroast exhibiting 7.7 times the average antioxidant value of these same green teas.
Data also show that Puroast has an average 70% lower acid level compared to the other coffee brands tested.
The study methods included using a well-known antioxidant, BHT (butylated hydroxytoluene) as a standard to measure against for tie various coffee and tea products tested.
Coffee samples were provided courtesy ofPuroast? Coffee Company. The coffee identities were made available after testing.
I and my research team hypothesize that the Pr roast roasting method may produce coffee with simultaneously higher pH/lower acid and higher antioxidant levels, and that it is feasible the reduced acid has been converted to antioxidants via th.s roasting process.
These results are significant to the food techno logy and chemistry community and I have submitted the findings for presentation at the 246th National Meeting and Exposition of the American Chemical Society (ACS) in Indianapol.is later this Fall.
I also believe this is important information for consumers, and that your company can use the findings of this research at your discretion after the ACS presentation.
Sincerely,
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Takayuki-Shibamoto Distinguished Professor Department of Environmental Toxicology University of California, Davis
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