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

Most soaps do not kill organisims on its own unless it has an active ingredient for this specific function, but removes them from the skin emulsifying all the fatty acids on the skin and removing them which can also include cells that are not firmly attached to the skin.
This is why it is recommended to fully cover one’s hands with soap and rub for at least 20 seconds for the emulsion to occur and then rinse. When a proper hand wash is done one can feel the skin dry as the soap removed most of the fats and oils from the skin. In a way you are not killing cells but removing them from the skin.

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