Used coffee grounds are a rich source of healthful antioxidants
To plant food, insect repellant and other homespun uses for spent coffee grounds, scientists are adding an application that could make the gunk left over from brewing coffee a valuable resource for production of dietary supplements. Their new report in ACS' Journal of Agricultural and Food Chemistry concludes that used coffee grounds are a rich source of healthful antioxidant substances. Maria-Paz de Peña and colleagues explain that people around the world drink millions of cups of coffee every day, generating about 20 million tons of used grounds annually. Although some spent coffee grounds find commercial use as farm fertilizer, most end up in trash destined for landfills. Coffee itself is a rich source of healthful antioxidants. De Peña's team wondered about the amount of antioxidants that remained in used coffee grounds from different coffee-making methods.
They found that filter, plunger and espresso-type coffeemakers left more antioxidants in coffee grounds, while mocha coffeemakers left the least. Because filter and espresso coffeemakers are more common in homes and commercial kitchens, the authors report that most grounds are likely to be good sources of antioxidants and other useful substances. They note that after these compounds are extracted, the grounds can still be used for fertilizer.
Source: American Chemical Society
- Used coffee grounds are a rich source of healthful antioxidantsfrom Science DailyWed, 9 Jan 2013, 12:00:40 EST
- Used coffee grounds are a rich source of healthful antioxidantsfrom PhysorgWed, 9 Jan 2013, 11:00:28 EST
Latest Science NewsletterGet the latest and most popular science news articles of the week in your Inbox! It's free!
Learn more about
Check out our next project, Biology.Net
From other science news sites
Popular science news articles
- T-cells can be directed to treat a variety of ovarian cancers
- ORNL-led study analyzes electric grid vulnerabilities in extreme weather areas
- New fossil evidence supports theory that first mass extinction engineered by early animals
- Abundant and diverse ecosystem found in area targeted for deep-sea mining
- Green monkeys acquired Staphylococcus aureus from humans
- NASA sees Darby's strongest storms north of center
- UT Southwestern researchers identify new mechanism of tuberculosis infection
- New therapeutic targets for small cell lung cancer identified
- Artificial muscle for soft robotics: Low voltage, high hopes
- Imaging software predicts how you look with different hair styles, colors, appearances