Die Einnahme einer einzelnen Kapsel mit 200 mg entkoffeiniertem Kaffeekirschextrakt verbesserte das Arbeitsgedächtnis in einer placebokontrollierten Studie an Erwachsenen mittleren Alters. Als ganze Kaffeekirsche bezeichnet man die gesamte Frucht der Kaffeepflanze, einschließlich der Außenschale, des Fruchtfleisches und der Kaffeebohnen (Samen) im Inneren.

I’ve linked to the news release in the post above. In this comment, for those interested, here’s the link to the peer reviewed journal article:

https://www.mdpi.com/2072-6643/16/14/2348

From the linked article:

A recent placebo-controlled study on middle-aged adults found that taking a single capsule containing 200 mg of decaffeinated whole coffee cherry extract improves performance in two types of cognitive tasks: working memory and response inhibition. Long-term results indicate that these supplements also improve accuracy in these tasks. The paper was published in Nutrients.

Whole coffee cherry refers to the entire fruit of the coffee plant, including the outer skin, pulp, and the coffee beans (seeds) inside. Traditionally, the beans are extracted, and the rest of the cherry is discarded or used as compost.

At the start of the study, the group taking coffee cherry extract already demonstrated better cognitive performance than the control group (the group taking microcellulose). Despite this initial advantage, the coffee cherry extract group showed greater improvements on cognitive tests after taking the supplement.

One hour after consuming a single 200 mg dose of coffee cherry extract, this group demonstrated significantly stronger performance on the working memory test compared to the placebo group. Specifically, the number of omissions on one type of working memory test (n-back) decreased by 81% in the coffee cherry extract group, compared to an 11% decrease in the placebo group. The number of correct answers on the same test increased by 25% in the coffee cherry extract group, compared to a 5% increase in the placebo group.

Similarly, the group taking coffee cherry extract showed improved accuracy and fewer omissions one hour after taking the supplement on response inhibition tasks (Go/No-go tasks) compared to the placebo group. Over the long term, the coffee cherry extract group outperformed the placebo group in measures of accuracy on cognitive tasks.