At night, your skin undergoes a significant period of repair and renewal. Several key processes occur that contribute to a healthier complexion.
Cellular Renewal and Repair
Between 11 pm and midnight, skin cell mitosis—the process of cell division—reaches its peak. This is crucial for skin renewal and repair, whether you're asleep or not. [Source: Dennisgrossmd, Feb 5, 2020]. This cellular activity helps to replace damaged skin cells and promote a more even skin tone. [Source: Swinyer Woseth Dermatology, Oct 1, 2023].
Increased Blood Flow
Epidermal blood flow increases during sleep. This delivers a surge of oxygen and nutrients to skin cells, supporting their function and aiding in the repair process. [Source: Aurelia London].
Moisture Loss
Paradoxically, while your skin is repairing, it also experiences increased trans-epidermal water loss (TEWL) at night. A good night cream can help prevent excessive moisture loss. [Source: Dennisgrossmd, Feb 5, 2020].
Reduced Sebum Production
Sebum (oil) production is lower at night compared to the midday peak. [Source: The Healthy, Nov 30, 2020]. This is important to consider when choosing nighttime skincare products, avoiding overly oily formulations.
Circadian Rhythm Influence
Skin, like the rest of your body, follows a circadian rhythm, exhibiting different activities during the day and night. [Source: Estée Lauder]. The nighttime is dedicated primarily to repair and renewal.
Sleep Position and Skin
Your sleeping position can also impact your skin. Sleeping on rough fabrics or compressing your face for extended periods can contribute to wrinkles. [Source: Healthline].
Practical Considerations:
- Night Creams: Applying a night cream can help to replenish moisture and support the skin's natural repair processes. [Source: Swinyer Woseth Dermatology]
- Gentle Cleansers: Use gentle cleansers before bed to remove impurities without stripping your skin's natural oils. [Source: Byrdie]
