Eli5 If water keeps me hydrated and I drink a lot of water, what do I even need lotion and moisturizers for?
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You need lotion and moisturizers to ensure cosmetic companies make money.
For normal people lotion and moisturizer is probably bad for your skin.
>The results suggest that long-term treatment with moisturizers on normal skin may increase skin susceptibility to irritants.
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>[https://pubmed.ncbi.nlm.nih.gov/10086859/](https://pubmed.ncbi.nlm.nih.gov/10086859/)
>This is one problem that hasn’t suffered from lack of attention: there are dozens of creams and lotions for dry skin. They are sold as moisturizers, which is more of a marketing term than a medical or scientific one. Indeed, routine skin care is a realm where there’s little science to be found. Well-controlled studies of ingredients are few and far between
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>[https://www.health.harvard.edu/staying-healthy/moisturizers-do-they-work](https://www.health.harvard.edu/staying-healthy/moisturizers-do-they-work)
There are various dermatologist that advice against using them
> using moisturizer was not only a waste of time, but potentially damaging to my skin. “When you use moisturizer every day, you run the risk of making your skin older, not younger,” he warned. “If you apply a lot of moisture, skin will become sensitive, dry, dull, and interfere with natural hydration.”
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>https://www.refinery29.com/en-us/is-moisturizer-bad-for-you
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