eli5 Why does the handwash/soap only kill the microorganisms but not our own skin cells?

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I read how soap kills the microorganisms like bacteria by tearing apart their cell membranes.

Does that affect our skin cells also, does the top most layer of our skin also dies and we are just too big on cellular scale that we don’t feel anything?

P.S. i know millions of cells die in our body everyday so it doesn’t matter still just curious does soap also kill outer most skin cells?

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7 Answers

Anonymous 0 Comments

Soap does not necessarily kill bacteria. Against viruses, it does better.

With a virus, for soap to be successful the DNA or RNA strand is encapsulated in a protective fatty layer. Soap breaks down that layer by making water wetter! (Thank you for the one thing I learned at an Amway meeting.) Without the protective lipid, the virus is destroyed by the air and environment.

With a bacteria, there is a cell wall so the wetter water aspect of soap is not as important to “killing” the bacteria, but important to physically washing it away.

Soap can kill viruses by stripping off their protective lipid layer. Soap can get rid of bacteria by helping wash them away. (Ergo, soap does not kill cells with a solid cell wall, like the cells in our skin.)

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