A recent study indicates that certain bitter plant compounds, found in items like cocoa, apples, berries, and red wine, might temporarily boost memory by triggering an “alarm system” in the brain.
Researchers from Japan’s Shibaura Institute of Technology observed that when mice consumed flavanols—plant-based compounds known for their antioxidant effects—their brains emitted significant amounts of norepinephrine. This chemical is linked to increased alertness and focus.
In fact, the mice exhibited a roughly 30% improvement on memory tests within an hour compared to those that hadn’t ingested flavanols. This finding was published in October in the journal Current Research in Food Science.
The study revealed that the mice given flavanols also displayed enhanced movement and exploration.
According to lead researcher Yasuyuki Fujii, the astringent taste of flavanols may act as a stimulus that sends signals directly to the central nervous system.
Fujii further explained that this reaction could set off physiological responses throughout the body via the sympathetic nervous system, which plays a role in managing attention and stress responses.
The mice underwent a test involving “novel object recognition,” where they spent about 10 minutes examining two identical objects. One object was then swapped for a different one; the time the mice spent exploring the new object suggested they remembered the previous one.
The researchers stated that the flavanols work through taste rather than chemical absorption. Specifically, the bitter notes in foods like dark chocolate and strong tea seem to activate sensory nerves that connect directly to the brain stem.
While this study hints at the possibility that flavanol-rich diets may support the transition from short-term to long-term memory, researchers noted that these claims aren’t definitively proven.
This process triggers the locus coeruleus, a small part of the brain that releases noradrenaline, which aids in memory retention.
Interestingly, this study adds a layer to past research that correlated diets high in flavanols with enhanced memory in older adults.
Rather than just acting as nutrients that safeguard brain cells, these compounds might stimulate the body’s alert system, potentially boosting learning and concentration.
Fujii mentioned that the stress response linked to flavanols resembles that caused by physical exercise. Consequently, even though they have low absorption rates, moderate consumption of flavanols could enhance health and overall quality of life.
However, what’s striking is that “low bioavailability” means the body absorbs only a fraction of flavanols from foods like cocoa and berries. The doses given to the mice were significantly higher than those typically found in regular servings of dark chocolate or berries.
In conclusion, while this study suggests positive effects of flavanols on memory, the authors emphasized the necessity for human trials to verify if similar short-term memory improvements can be achieved and whether repeated consumption could lead to potential tolerance or stress-related issues.
