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    The Truth About Beauty Sleep

    3. Brighter, Less Puffy Eyes continued...

    Plenty of rest can also minimize dark circles. When blood isn’t flowing well -- which happens when you’re low on sleep -- it can collect under eyes and become visible, since the skin there is so thin. 

    Discoloration under eyes can also be caused by genes, age, and increased melanin (the brown pigment in skin that causes it to tan in the sun). If this is the case, sleep deprivation can make your under-eye issue worse, Breus says.

    4. Healthier, Fuller Hair

    Hair loss, breakage, damage, and even growth can all be affected by lack of sleep, Breus says. Hair follicles (where hair growth begins) gain nutrients, vitamins, and minerals from blood flow. Since blood flow decreases when we’re short on shut-eye, “hair gets less food, it weakens, and it has difficulty growing,” Breus says.  

    Lack of Zzz's can also lead to more stress, Wexler says. “Stress causes an increase in the hormone cortisol, which can cause you to lose hair.” 

    5. Happier, Healthier Appearance

    Being short on sleep can cause the corners of your mouth to droop, making you look sadder than you do after a good night’s rest.

    “When you’re tired, your facial expressions change in subtle and consistent ways. We tend to furrow and frown more,” Day says. “When people say, ‘You look tired,’ it can be because of these expressions.”

    Red, swollen eyes, dark circles, sagging eyelids, and paler skin can also signal to others that you’re exhausted.

    People who don't get enough rest are also seen as less healthy than when they’re rested. 

    6. Products Work Better

    Your skin can focus on repairing itself while you sleep, since it isn’t defending itself from sun and free radicals (harmful molecules from the environment). Blood flow is also more consistent, and this helps your skin benefit from the flesh-repairing ingredients in your beauty products, Wexler says.

    Skin also loses more water when you sleep than it does during the day. Apply a creamier moisturizer before bed and drink plenty of water during the day to help your complexion stay hydrated overnight, Day says.

    Brush Up on Beauty

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