The onion may turn black because it would eventually rot from both cell breakdown events and bacterial contamination if you left it out not because it absorbs germs.
Onion in room to absorb germs.
In fact the onion s own juices are.
You can remove the socks in the morning.
There is of course no more scientific basis for the belief that onions absorb all the germs in a room than there is for the belief that onions rid the air of infectious poisons viruses and bacteria can become airborne via droplets of saliva or mucus when people cough or sneeze but they don t generally speaking hover in the atmosphere like gases and odors.
The idea is that onions have the ability to absorb bacteria and viruses and will actually pull the germs out of the sick person.
This claim is a very old myth that has no medical or scientific basis whatsoever.
No onions do not absorb bacteria.
This practice reduces the bacteria in the air and prevents infections.
Also cut an onion into slices and place them in your socks and wear the socks before sleep.
The idea that a vegetable would attract and suck into itself bacteria from the air is not even logical.
There is no scientific evidence that a cut raw onion absorbs germs or rids the air of toxins poisons the national onion association says on its website.
It is the sulphuric acid that makes you cry by irritating the eyes.
Simply cut an onion into 4 pieces.
And of course to have bacteria multiply you need some source of bacteria in the first place.
Given that it is mayonnaise s acidity that retards the growth of bacteria it s hard to conclude that cut onions would be a hospitable place for germs or bacteria to take up residence let alone a.
Placing a cut onion in the room of someone who is sick is one suggested remedy that has been passed down in some families and even over social media every cold and flu season.
But sulphuric acid also inhibits the growth of bacteria.
Message claims that leaving onions around a room can absorb the flu virus along with bacteria that cause other illnesses thereby preventing people from becoming sick.
