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
- Stanford team achieves 'holy grail' of battery design: A stable lithium anode
- Common blood thinner for pregnant women proven ineffective: Lancet study
- Global warming 'pause' since 1998 reflects natural fluctuation
- Mammoth and mastodon behavior was less roam, more stay at home
- Four billion-year-old chemistry in cells today
- Smithsonian scientist and collaborators revise timeline of human origins
- Meet the gomphothere: UA archaeologist involved in discovery of bones of elephant ancestor
- New view of Rainier's volcanic plumbing
- Domestication syndrome: White patches, baby faces and tameness
- Extinct human cousin gave Tibetans advantage at high elevation