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

The top most layer of your skin is already dead. As our skin cells move from the inside to outmost layer the cells get smaller and filled with keratin until your left with a layer of lots of hard dead cells.

Soap is an emulsifier, meaning it makes fats and water mix. Both our cells and bacteria have cell membranes made of fats so the soap makes this mix with water and cause them to burst. It also carries them in tiny bubbles that can be washed off out skin.

This process does affect the top layer of skin cells but as said they are already dead and the skin is constantly replacing itself, so it has no overall effect on us.

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