Piperine: The Spicy Substance from Pepper
People sprinkle pepper over the soup – and suddenly it becomes spicy. The substance behind it is called piperine. Researchers are looking closely at what it does in the body.
1. What Is It Actually?
Piperine is the substance that makes pepper spicy. If you put a peppercorn on your tongue, you feel a sting and a warmth. This does not come from heat, but from piperine. It irritates fine nerves in your mouth that otherwise report that something is hot or unpleasant. Your head then thinks: Attention, spicy!
Piperine is a natural substance. Natural substances are substances that plants, animals or tiny living beings produce themselves. Piperine is formed in the pepper plant, not in a factory. It can be extracted from dried peppercorns, similar to how the flavour is drawn from tea leaves into hot water.
Spicy, by the way, is not the same as poisonous. A spicy substance is a signal, not a poison. Some people like this signal very much, others not at all – that is a matter of taste, and both are fine.
In research, piperine is used as an individual substance obtained from pepper. Researchers look, for example, at whether piperine changes how the body absorbs other substances. This is an interesting question, and it has not yet been fully answered.
2. Where Does It Come From?
You know piperine from the kitchen: it is found in black pepper. The pepper plant grows as a climbing plant, and its small round fruits are dried. This produces the peppercorns you know from the shaker. The piperine is located in the fruit.
When peppercorns are ground, piperine remains. It does not evaporate like a scent. That is why ground pepper tastes just as spicy as a whole peppercorn that you bite.
Piperine also occurs in a few related plants of the pepper family. For us, one thing is especially important: no one had to invent piperine artificially. The plant produces it itself.
3. What Are the Researchers Investigating?
There are many studies on piperine. In some of them, research was conducted on humans, that is with real participants and not only in the laboratory. Some of these investigations were controlled. This means there was a comparison group that received something else. This allows researchers to recognise better whether a change really comes from the substance.
It is noticeable: in most human studies, piperine was not tested alone, but together with curcuminoids, the yellow pigments from the turmeric root. The researchers asked, for example, whether something changed in the participants’ blood or how they felt. From such a mixture it cannot be deduced what piperine alone achieves. For that, separate studies with piperine alone would be needed.
Much is therefore still open. Researchers continue to investigate how piperine acts in the body and whether it really helps other substances to be absorbed better. This is a testable question, and it continues to be worked on.
4. An Experiment to Think About
Imagine you are cooking a large pot of pumpkin soup. It tastes mild and a little sweet. Now add a single peppercorn. Hard to believe: you can taste it. A tiny grain changes the flavour of an entire pot.
You can try this together with an adult, using soup, yoghurt or mashed potatoes. First take a spoonful without pepper, then a spoonful with a single ground peppercorn. Does it taste different? Tell someone what you noticed.
This small observation is the beginning of all research: first someone notices something small, then asks: why is that so? Researchers ask exactly the same about piperine.
For adults and professionals: the detailed page on piperine.
Frequently Asked Questions
Why is pepper spicy?
Piperine is in the pepper fruit. It irritates fine nerves in your mouth that usually report heat. That is why pepper feels hot, even though it is cold.
Can piperine help me when I am ill?
It is not yet certain. Researchers are currently investigating whether piperine changes something in the body. There is no final result on this yet.
Why is piperine often studied together with turmeric?
In the human studies, piperine was almost always given together with the yellow pigments of the turmeric root. The researchers wanted to know whether the mixture changes something. What piperine does completely on its own has not yet been clarified.
Every statement on this page carries its evidence tier — proven, plausible or hypothesis — and leads to the original work. The decision in the individual case rests with the practitioner; we provide the connections.