Coffee Fruit Extract Explained Simply

1. What It Is About

The coffee plant bears cherries. Inside them are the beans used to make coffee. Surrounding them are the fruit skin and fruit flesh. These residues remain after coffee production and are used to produce coffee fruit extract.

The extract contains polyphenols, which are plant compounds, as well as chlorogenic acids and proanthocyanidins. The amount of these substances in an extract varies from batch to batch. It depends on the coffee variety, the cultivation method, and how the extract is obtained — for example, using water or alcohol.

Important for understanding the studies: coffee fruit extract is not a uniform product. Two extracts can have different compositions. It is often combined with other substances, such as phosphatidylserine. Whether the body actually absorbs the plant compounds has rarely been measured directly. Many studies instead measure blood values or performance in computer-based tasks.

2. What Studies Show

The best-studied effects relate to attention and memory. The results are indications but not yet conclusive.

In a study involving 138 healthy adults aged 40 to 65 who reported memory complaints, participants took a combination of coffee fruit extract and phosphatidylserine for 42 days 2. They performed numerical tasks more accurately and reacted faster than the placebo group. They also performed better in recognising images. Since the mixture contained two substances, it cannot be determined which contribution came from the coffee fruit extract.

A smaller study tested a single dose in older people who reported memory problems themselves 1. Afterward, participants reacted faster and made fewer errors in memory and attention tasks. Certain blood biomarkers linked to nerve cells did not increase.

In a Japanese study, 66 adults aged 40 and over with suspected mild memory and thinking problems received either coffee cherry pulp extract or a placebo daily for twelve weeks 7. In a memory test, the group receiving the extract showed greater improvement than the placebo group. The number of participants was small, and no blood values or brain scans were taken.

Another study in healthy adults tested a decaffeinated extract and had participants complete tasks at home on a computer 4. In the short term, fewer tasks were omitted and more were solved correctly; over a longer period, the extract performed better than placebo. The number of participants was not reported.

Showed: In two further areas, effects were observed. In a study with 61 healthy participants over twelve weeks, cholesterol and LDL levels — the unfavourable type of cholesterol — decreased, while blood sugar levels remained more stable than with placebo; no adverse events were reported 3. In a 60-day study with 42 participants, a spray containing coffee cherry pulp extract improved skin moisture and tone and reduced wrinkles 5. In twelve trained cyclists, coffee cherry extract led to slightly more work done during a time trial and lower perceived exertion, but did not speed up the replenishment of muscle stores 6.

3. What Remains Unclear

Almost all studies were short-term. Single doses and a few weeks are the norm; how an extract affects the body over months or years remains an open question. The participants were almost always healthy individuals. Studies in people with medical conditions have not yet been conducted.

The extracts themselves vary in composition. Therefore, the studies do not clarify which dose or which ingredient explains the observed differences. Several studies tested mixtures with additional substances, so the effect of the extract alone remains uncertain.

Older studies on laxatives derived from coffee fruit residues are not comparable to modern extracts; they provide no information about the tolerability of current extracts in typical doses. Whether extracts with consistent composition are tolerable in healthy and in unwell people remains to be determined. The studies needed to clarify this would need to be longer, larger, and use extracts of consistent composition.

4. What This Means in Everyday Life

The observed differences mostly relate to tasks performed on a computer or in a test setting: reaction time, accuracy, perceived exertion. Whether this translates into everyday benefits — such as remembering names better in conversation or staying more focused at work — has not been studied. The tests are sensitive enough to detect small differences; whether these differences are noticeable to individuals remains open.

A second point is comparability. Comparing different products often means comparing extracts with different compositions, sometimes in mixtures. A statement like 'the extract works' cannot be derived from this.

What needs to be clarified next is whether extracts with consistent composition show the same observations over several months and whether this also applies to people with complaints.

All details with study numbers and sources: detailed page on coffee fruit extract. For children: Coffee fruit extract for children.