You probably do not think twice about cinnamon.
It may be the spice sprinkled over a bowl of oats, added to a warm drink or baked into a favourite cake. For most people, cinnamon is simply a familiar ingredient found in the kitchen.
But within that familiar spice is a natural compound that scientists are now studying for its potential role in healthcare.
Professor Dr Goh Khang Wen, Pro Vice-Chancellor (Global Engagement) of INTI International University, was part of an international research team that investigated cinnamaldehyde, one of the main compounds responsible for cinnamon’s distinctive smell and flavour.
A team of international researchers, including Professor Dr Goh Khang Wen, Pro Vice-Chancellor (Global Engagement) of INTI International University, investigated cinnamaldehyde, one of the main compounds responsible for cinnamon’s distinctive smell and flavour.
Published in the Journal of Chemistry, the study, titled “Evaluation of Antioxidant and Enzyme Inhibitory Properties of Cinnamaldehyde: In Vitro and In Silico Investigations”, examined the compound through laboratory experiments and computer-based simulations.
The researchers evaluated cinnamaldehyde’s antioxidant properties as well as its ability to inhibit, or slow the activity of, several enzymes. Among the key findings were its effects on two enzymes, acetylcholinesterase and butyrylcholinesterase.
“Cinnamaldehyde could inhibit two enzymes, known as acetylcholinesterase and butyrylcholinesterase,” said Prof Goh. “These enzymes break down a chemical messenger called acetylcholine, which allows nerve cells to communicate and plays an important role in memory and learning.”
Because these enzymes have already been studied as therapeutic targets in research on conditions such as Alzheimer’s disease, the findings suggest that cinnamaldehyde may be worth investigating further.
This does not mean that cinnamon itself can treat memory problems or neurological disease. Rather, the study identifies biological activity that could provide a starting point for future research.
To better understand how the compound behaves, the researchers also used computer-based simulations to examine how cinnamaldehyde might interact with the enzymes at a molecular level. In simple terms, these simulations allow scientists to see how a compound may fit with and interact with a particular enzyme or protein, much like examining how two pieces of a puzzle might fit together.
“Natural compounds give us many possibilities to explore, but understanding their potential requires us to look closely at how they interact with biological systems,” said Prof Goh. “By combining experimental research with computational methods, we can gain a clearer picture of which compounds may be worth investigating further.”
The study examined cinnamaldehyde’s antioxidant and enzyme-inhibitory properties through laboratory experiments and computer-based simulations, including its interaction with enzymes linked to memory, learning and pigmentation.
The study also produced a separate finding involving tyrosinase, an enzyme involved in the production of melanin, the natural pigment responsible for the colour of our skin, hair and eyes.
Cinnamaldehyde showed an ability to inhibit this enzyme as well, suggesting another possible area of research involving pigmentation and related conditions.
Together, the findings show that a single natural compound can interact with different biological targets. They also point researchers towards several areas that may warrant closer study.
Identifying biological activity is only an early step in drug discovery. Researchers would still need to understand how the compound works in greater detail, establish whether it is safe, determine an appropriate dosage, and investigate whether the effects observed in laboratory studies can be reproduced in living organisms before it could move towards development as a medicine.
“Sometimes, the most interesting research questions can come from things we encounter every day,” said Prof Goh. “Cinnamon is a good example of how a familiar natural product can become the subject of detailed scientific research when we start asking what its individual compounds can do.”
For now, cinnamaldehyde remains in the early stages of investigation, but its activity against several biological targets raises new questions as researchers explore its possible applications.