Researchers report that previously unknown molecules in roasted coffee beans inhibit carbohydrate-digesting enzymes more effectively than a commonly used diabetes drug.
By yourNEWS Media Newsroom
Scientists in China have identified a group of previously unknown compounds in roasted coffee beans that significantly slow the breakdown of carbohydrates into glucose, a finding that could expand understanding of how everyday foods influence blood sugar regulation.
Researchers at the Kunming Institute of Botany in Yunnan province reported that three newly identified molecules—named caffaldehydes A, B and C—demonstrated strong inhibition of alpha-glucosidase, the digestive enzyme responsible for converting complex carbohydrates into absorbable sugars. Excessive activity of this enzyme is associated with post-meal blood sugar spikes, a major challenge in the management of Type 2 diabetes.
The findings were published in Beverage Plant Research and were based on laboratory testing of compounds isolated from roasted Coffea arabica beans. According to the study, the caffaldehydes showed greater potency in enzyme inhibition than acarbose, a prescription medication widely used to reduce post-prandial glucose levels. The most active compound recorded inhibitory concentrations as low as 17.50 micromoles, compared with approximately 45 micromoles for acarbose under the same testing conditions.
In addition to the three caffaldehydes, researchers identified three trace diterpenes—magaric acid, octadecenoic acid and nonadecanoic acid—that also exhibited alpha-glucosidase-blocking activity. Diterpenes are naturally occurring compounds already known to be present in coffee, but the study suggests that their metabolic effects may be broader than previously understood.
The research team used a combination of nuclear magnetic resonance spectroscopy and liquid chromatography–mass spectrometry to isolate and characterize the compounds. The authors said the approach allowed them to efficiently identify bioactive molecules from complex food mixtures while reducing solvent use and processing time. They noted that the same analytical strategy could be applied to other foods to better understand their functional properties.
Coffee has been linked in earlier population studies to lower rates of Type 2 diabetes, though the biological mechanisms have not been fully explained. Prior research has focused on compounds such as kahweol and cafestol, which have been studied for their antioxidant, anticancer and metabolic effects. The newly identified caffaldehydes differ structurally from those compounds and appear to exert stronger effects on carbohydrate digestion.
Researchers also noted that coffee consumption has been associated in other studies with increased levels of adiponectin, a hormone that improves insulin sensitivity. While the current findings were limited to laboratory analysis, the authors said the results support continued investigation into coffee’s role in metabolic health.
The study’s authors cautioned that further research is needed to determine how factors such as bean variety, roasting intensity and brewing methods affect the availability of these compounds, as well as to assess their safety and effectiveness in living organisms.
Although the findings are preliminary, they add to growing scientific interest in the concept of food-based strategies for managing chronic metabolic conditions. Scientists involved in the research said future applications could include the development of coffee products or supplements designed to retain or concentrate these naturally occurring compounds, pending further study.
Watch Dr. Andrew Kaufman discussing whether coffee is healthy in this clip from the “Healthy Living Livestream.”
This video is from the What is happening channel on Brighteon.com.
Source: Natural News