The scent 'scare away the people'

Explain why humans smell badly in their mouths, legs, and armpits.

Have you ever woken up every morning just because you were annoyed by the smell of your mouth, or panicked because your feet "smelled" after a hot day of shoes? And do you keep others away because of your "slightly heavy" body odor?

Have you ever wondered if people always "unknowingly" alienate you, making you forever FA despite the hint of your "scent" ?

Let's find out why our bodies give off so many scents through scientific research below .

1. Morning halitosis

Have you ever wondered why every morning when you wake up, our mouth smells quite bad. This is a physiological phenomenon encountered at all. Some people even suffer from a ' chronic bad breath' disease without knowing why.

Everyone knows, there are always a lot of bacteria in the human mouth. They break down the structure of amino acids, proteins in food, produce volatile compounds with an unpleasant odor. They are hydrogen sulfide, dimethyl sulfide and methyl mercaptan - agents that cause odor.

However, when we are awake, the salivary glands are constantly secreted, washing away these substances before they can produce those compounds. This is also the reason why for a long day, our mouths are not foul.

However, after the last meal and an eight-hour night sleep, everything changed completely. During sleep, the salivary gland is limited, so the amount of saliva in the oral cavity decreases.

This is when bacteria accumulate in the tongue, interstitial teeth, produce compounds with a strong odor, especially hydrogen sulfide smells of rotten eggs. These gases don't wash away saliva like daytime, resulting in the morning after waking up, our mouths will smell foul.

2. Foot odor

Foot after a hot day wearing shoes is the reason why so many people are inferior in communication. The main reason people often think of is because much sweat is produced, causing an unpleasant smell, but it is an incorrect concept.

On the human body, two feet are the most sweaty part, because it has 250,000 sweat glands. On average, everyday people produce 0.5l of sweat in the foot. However, the main component of sweat is just salt and water, so basically, sweat doesn't directly cause foot odor.

The real killer is the bacteria on the skin . Under the condition of having to wear shoes, regular socks, persistent sweating causes the environment to be wet. This is the 'paradise' with odor-causing bacteria. Typically Brevibacteria - a type of dead skin on the legs.

This is also the kind of bacteria that makes odor for Limburger, Bel Paese cheese . In the process, they transform methionine into methanethiol - a characteristic odor.

In addition, an interesting information regarding foot odor was discovered by Bart IGOLS, the 2006 Nobel Prize-winning scientist. Accordingly, the foot odor in people is extremely attractive Anophele mosquito - the mosquito that transmits malaria. This discovery has created a premise for the method of eliminating dangerous organisms.

Anophele mosquitoes are extremely fond of foot odor.

Not only that, Ifakara Institute of Medicine, Tanzania in 2009 and 2011 built a chemical that contains the substance that causes the foot odor in humans, together with the smell of Limburger cheese to help attract Anophele mosquitoes, thereby destroying it thoroughly. let this mosquito.

3. Armpit odor

Along with bad breath and bad breath, armpit odor is a nightmare phenomenon and haunts many of us. According to expert Joseph Jordania, the armpit odor in particular and the body odor in general is a genetic element from our ancestors. That smell is found in ancient gibbons, to warn and ward off enemies at night. During evolution, it still exists and becomes 'undesirable legacy'.

In the armpit, due to sweating and constitutional movement, this part is somewhat wet and is the habitat of many skin bacteria such as: Corynebacterium, Propionibacteria or Staphylococcus epidermidis (odor-forming bacteria for many kinds of pho cool). They decompose the fat secreted by sweat to form smaller structural acids such as butyric acid, isovaleric acid, propionic acid .

To a certain extent, propionic acid has a similar chemical nature to acetic acid (vinegar) so it contributes to the acidity of the odor component in the armpit.

In addition, under the scientific world, armpit odor also depends on daily food, personal psychological status. If you eat a lot of foods with a strong smell, or increase the secretion of fluids or stress, the armpit condition will become worse than usual.