Ground pistachio coffee could be healthier alternative to decaf

June 26, 2014
Ground pistachio coffee could be healthier alternative to decaf

Coffee made from ground pistachios could be a healthier option for decaf drinkers, say scientists.

Pistachios have been used as a coffee alternative in Turkey for many years since have a similar aroma to conventional roasted . But their high means that instead of producing a dry powder, they make an oily, sludgy paste.

'This plant has been roasted and used as a caffeine-free alternative to coffee beans for many years, but it has such a high oil content that it didn't resemble the coffee grinds people know how to use at home. This meant it wasn't really a suitable alternative,' says Dr Fahrettin Gogus of the University of Gaziantep in Turkey, lead researcher on the NERC-funded project.

Gogus and his team have found a way to remove the excess oil produced in the roasting process to make ground coffee that you could use at home.

'We wanted to produce a powdery version which in the future could be widely used. This oil-free version can be used in any coffee machine to produce espresso-like coffee,' Gogus says. 'It is not exactly the same as a traditional cup of coffee; it has a very different aroma. But in the same way that Arabica coffee or Robusta have specific aromas our coffee has a pine and citrus aroma which makes it very special as a cup of coffee.'

The pine and citrus aroma is a product of certain compounds, called volatiles, which are found in the oil the pistachios produce during roasting. While some of the volatiles give the coffee a pleasant smell, others can be harmful. By roasting the nuts and then pressing them the scientists managed to remove half of the oil, together with those potentially harmful compounds.

'Yes, by removing the oil we lose some of the flavour, but we also remove the unwanted components,' says Gogus. 'Some of these volatiles are known to be carcinogenic but any product such as caramel or chocolate has some level of these. As long as we remove the oil after roasting, these amounts are very low. In a cup of coffee made with pistachio they wouldn't be harmful.'

Unlike decaffeinated coffee beans, pistachios haven't been treated chemically to remove the caffeine. The type of nut used to make the coffee, Pistacia terebinthus, is also known for its antioxidant, antiseptic and anti-inflammatory properties - making pistachio a much healthier alternative.

'We plan to seperate the we produce and sell it as a product in its own right, and we can use the rest of plant too so it will be a very sustainable process,' Gogus explains.

Explore further: Green coffee benefits prove limited in mice research

More information: Reference: Mustafa Z. Ozel, Derya K. Yan¿k, Fahrettin Gogus, Jacqueline F. Hamilton, Alastair C. Lewis, "Effect of roasting method and oil reduction on volatiles of roasted Pistacia terebinthus using direct thermal desorption-GCxGC-TOF/MS, LWT" - Food Science and Technology, dx.doi.org/10.1016/j.lwt.2014.05.004.

Related Stories

Green coffee benefits prove limited in mice research

May 1, 2014
The efficacy of green coffee extract to impact on an independent risk factor for cardiovascular heart disease has been proven ineffective in mice models fed high fat diets (HFD) a recent study has shown.

Recommended for you

Blowing smoke? E-cigarettes might help smokers quit

July 26, 2017
People who used e-cigarettes were more likely to kick the habit than those who didn't, a new study found.

Brain disease seen in most football players in large report

July 25, 2017
Research on 202 former football players found evidence of a brain disease linked to repeated head blows in nearly all of them, from athletes in the National Football League, college and even high school.

Safety of medical devices not often evaluated by sex, age, or race

July 25, 2017
Researchers at Yale and the University of California-San Francisco have found that few medical devices are analyzed to consider the influence of their users' sex, age, or race on safety and effectiveness.

Why you should consider more than looks when choosing a fitness tracker

July 25, 2017
A UNSW study of five popular physical activity monitors, including Fitbit and Jawbone models, has found their accuracy differs with the speed of activity, and where they are worn.

Dog walking could be key to ensuring activity in later life

July 24, 2017
A new study has shown that regularly walking a dog boosts levels of physical activity in older people, especially during the winter.

Study finds 275,000 calls to poison control centers for dietary supplement exposures from 2000 through 2012

July 24, 2017
U.S. Poison Control Centers receive a call every 24 minutes, on average, regarding dietary supplement exposures, according to a new study from the Center for Injury Research and Policy and the Central Ohio Poison Center, ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.