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Why 70 Percent Alcohol Disinfects Better Than 91 Percent, According to a Microbiologist

Rubbing alcohol

Depending on what kind of germs you’re trying to kill, 70 percent alcohol is probably more effective than 91 percent for disinfecting.

A 90 percent alcohol solution is too powerful in some cases. It kills the outside of the cell before it can get into the inside and kill the actual germ.

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Why 70 Percent Alcohol Disinfects Better Than 91 Percent, According to a Microbiologist

Why 70 Percent Alcohol Disinfects Better Than 91 Percent, According to a Microbiologist

https://www.apartmenttherapy.com/isopropyl-alcohol-percent-disinfecting-36723904

apartmenttherapy.com

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Key Ideas

Rubbing alcohol

Depending on what kind of germs you’re trying to kill, 70 percent alcohol is probably more effective than 91 percent for disinfecting.

A 90 percent alcohol solution is too powerful in some cases. It kills the outside of the cell before it can get into the inside and kill the actual germ.

Alcohol percentages

  • To fend off bacteria, a 70 percent alcohol solution with water in it allows it to cross a cell membrane and kills the entire cell.
  • Viruses with an envelope structure, including the new virus, can be deactivated by alcohol solutions of 60 percent.
  • Any concentration of alcohol won't effectively target the norovirus.

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Spreading respiratory viruses

Our hands are the front lines in the war against the new virus.
Respiratory viruses (the new virus, the flu, and the common cold)  can be spread via our hands: We can pick up dro...

Prevention is essential
  • Wash your hands often for at least 20 seconds.
  • Cover your cough or sneeze with a tissue, then throw the tissue in the trash.
  • Clean and disinfect frequently touched objects.
  • Stay home when you are sick.
  • Contact a health worker if you have symptoms; fever and a dry cough are most common.
  • Don't touch your face.
  • Don't travel if you have a fever and cough.
The top way to clean our hands

Washing your hands with soap and water is the top way to clean our hands. If soap is not available, using a hand sanitizer with at least 60% alcohol can help.
When you wash your hands with soap and water, you’re wiping viruses off your hands and sending them down the drain. The whole process is actually annihilating the viruses, rendering them harmless.

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Wash Your Hands

The best way to lower your risk of contracting the new virus is to wash your hands after you cough, sneeze, touch your face, and when you leave and return from the grocery store.

It's also i...

To Keep Yourself Virus-Free
  • Wash your hands.
  • Stay home if you can.
  • If you're coughing or sneezing, wear a protective mask.
  • First clean, then disinfect your home.
  • Target high-touch surfaces daily.
Disinfectants

The EPA has a full list of disinfectants that will kill the new virus.

Disinfectant that will work is disinfecting wipes, disinfectant spray, Isopropyl alcohol, and hydrogen peroxide.

If you cannot find store-bought disinfectants, you can make a disinfectant spray with 4 teaspoons household bleach mixed with 1-quart water into a spray bottle. To use, spray on the surface, wait for 10 minutes and wipe away with a wet cloth. Don't mix bleach with another cleaning chemical.

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Drink 8 Glasses of Water a Day

Everyone has a different requirement for water. Temperature, humidity, size, age, gender and activity have an influence on your fluid needs.

Instead, drink when you are thirsty.

Eggs Harm Your Heart

Eggs have a lot of cholesterol compared to other foods. Although cholesterol in the blood is strongly related to heart disease, eating cholesterol is weakly associated with raising the cholesterol levels in your blood.

Eggs have other heart-protecting properties and eating it probably won't harm your heart.

Cancer or Alzheimer’s From Antiperspirant
  • A chain email in the 1990s was responsible for the false belief that antiperspirant was raising the risk of breast cancer. 
  • When researchers found higher ratios of aluminum in the brains of Alzheimer's patients, aluminum in antiperspirant was suspect. But it seems aluminum in antiperspirant is hardly absorbed by your skin.

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