Chocolate Trivia:Dark chocolate tastes like feces?

What is the taste of dark chocolate? Some people say that it has a special aroma, and some…

What is the taste of dark chocolate?


Some people say that it has a special aroma, and some people feel that dark chocolate is stinky.

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

Now, scientists tell you by experiment, yes, it is stinky.

Eating dark chocolate is equivalent to taste of…

Dark Chocolate (Source: pixabay)

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

Who constitutes the mysterious smell?

Scientists have previously analyzed the taste of dark chocolate. They used the GC-O method to identify and compare the main odor molecules in dark chocolate.

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

Tip: The GC-O method is an effective way to select and evaluate odor active substances from complex mixtures by correlating the separation ability of gas chromatography with the sensitive olfactory sense of human nose. The human nose acts as a powerful detector. effect. Because a person’s nose is usually more sensitive than any physical detector.

It was found that isobutyraldehyde (a pungent odor), 2-methylbutanal (a molecule found in apples, mainly sweet), 3-methylbutanal (a type of citrus present) Molecules, some like apple scent), phenylacetaldehyde (a molecule found in roses, mainly cherry) and linalool (widely found in plants, similar to the taste of bergamot) are the main volatilization of the dark chocolate odor. Molecule [1].

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

Eating dark chocolate is equivalent to taste of…

Molecular mass spectrum of cocoa flavor compounds

But since they did not test the odor activity values ​​(OAVs) of these odor molecules, they were not sure whether they were the true source of dark chocolate flavor.

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

Tip: The formula for calculating the odor activity value is: OAVs = concentration/threshold of the substance. If the calculated value is not greater than or equal to 1, it means that the threshold range of human sniffering is not reached, and it is difficult to be smelled.

That is to say, the composition of its aroma molecules is its main. What the hell is that?

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

So two more scientists took dark chocolate for experimentation.

Food chemist Michael Granvogl of Hohenheim University in Stuttgart, Germany, and his colleagues picked two different types of dark chocolate from a grocery store, with a cocoa content of more than 90% in one chocolate and 99% in the other [ 2].

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

Then they crushed the black chocolate they bought, extracted the volatile compounds and re-analyzed them.

Compared with previous explorations, they not only increased the odor activity test, but also reorganized the odor of dark chocolate. After recombination, it was compared with the true chocolate odor to verify the accuracy of the experimental results.

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

In the end, they detected about 70 volatile chemicals that produced aromatics (as shown below), 28 to 30 of which were found in both chocolates and were high enough to smell (OAV ≥ 1). .

Eating dark chocolate is equivalent to taste of…

What are the main odors?

Chocolate Trivia:Dark chocolate tastes like feces?
Chocolate Trivia:Dark chocolate tastes like feces?

The first four compounds with higher degree of coincidence are: dimethyl trisulfide, acetic acid, 3-methylbutyric acid, and phenylacetic acid. They should be mixed with the taste of dark chocolate. However, what are their tastes?

The highest activity is: dimethyl trisulfide

Dimethyltrisulfide is found in onions, leeks and other allium species, as well as in the volatiles released by broccoli and cabbage.

These look quite normal, the emmm behind…

Dimethyltrisulfide is also a product of the early stages of corpse decomposition, and the larva will be attracted when it smells this. Because they can sniff up to 1.6 kilometers, they are often the first insects to come into contact with the body. They lay eggs on the corpses, and the hatched larvae secrete proteolytic enzymes to digest the proteins of the corpses.

Eating dark chocolate is equivalent to taste of…

In addition, dimethyl trisulfide, dimethyl sulfide and dimethyl disulfide are volatile compounds released by plants called the Helicodiceros muscivorus. When flies are attracted by these odors, they can accumulate on plants and indirectly help plants to pollinate.

Eating dark chocolate is equivalent to taste of…

Dimethyltrisulfide is one of the malodorous ingredients emitted by the ghost of the genus Pseudomonas, and is also a characteristic malodor of fungal lesions. According to research, some cancerous wounds in patients with advanced cancer have foul-smelling wounds due to the decomposition of toxins and cadaverine produced by tumor necrosis. This is due to the presence of fungi, which can multiply in the lesions and give off an unpleasant odor. This is the taste of dimethyl trisulfide.

Eating dark chocolate is equivalent to taste of…

Dimethyl dimethyl trisulfide (DMTS) as a common malodor, (Source: [4])

It is also one of the odor components of human feces…

Acetic acid

Eating dark chocolate is equivalent to taste of…

This is not much to say, the taste of vinegar!

3-methylbutyric acid

This thing is fruity at low concentrations, but at high concentrations it is the scent of rancid and cheese.

Phenylacetic acid

It is sweet. Phenylacetic acid is widely found in grapes, strawberries, cocoa, green tea, honey, and the like. Phenylacetic acid has a sweet honey taste at low concentrations and a sweet taste below 1 ppm, which is an important flavor ingredient.

I saw that I don’t really want to eat black…

Scientists mixed and reorganized the above odor molecules to try to simulate the smell of dark chocolate.

Eating dark chocolate is equivalent to taste of…

The reconstituted scent, where A is 90% cocoa and chocolate, B is 99% cocoa chocolate, and the volunteers judge their taste. According to the data, the solid line is the true dark chocolate scent, the dotted line is Simulating the odor of the recombination, the volunteer’s judgment shows that the simulation approximation is high. (Source: Literature [2])

Then, they put the simulated smell in a box, and the other box puts real dark chocolate, so that more than 20 volunteers can distinguish which one is true through the sense of smell. It turned out that the smell of fake dark chocolate made was really no different.

For the first time, this study used the most advanced technology to identify dark chocolate odors and rebuild the smell of dark chocolate. In the future, it can be simulated that there is one more smell of food.

So in the end, dark chocolate is a mixture of stinky, sour, milky, rancid, sweet…

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