The best serum to use before bed is one that supports what your skin is already doing at night: renewing itself. Look for reparative ingredients such as peptides, retinoids or niacinamide, paired with hydrators and barrier-supporting lipids to offset the extra moisture skin loses overnight. The right choice depends on your skin type and goals.
Why use a serum at night?
Skin follows a roughly 24-hour circadian rhythm. During the day it focuses on defense, and at night it shifts toward renewal: skin cell renewal activity tends to peak around midnight, and skin becomes more permeable in the evening. That makes bedtime the most strategic moment for a concentrated treatment serum. Learn more about circadian skincare.
Ingredients to look for in a night serum
Peptides
Peptides are short chains of amino acids that help skin look firmer and smoother. Signal peptides and carrier peptides are among the most studied in skincare. Because peptides are fragile, look for formulas that protect them with encapsulation or a dedicated delivery system.
Retinoids
Retinol and other retinoids are classic nighttime ingredients because they break down in sunlight and can increase sun sensitivity. They are effective for texture and the look of fine lines, but can be irritating, so start slowly.
Niacinamide
Niacinamide (vitamin B3) supports the skin barrier and helps skin look brighter and more even. Lower concentrations, around 2 to 5%, tend to be well tolerated, even by sensitive skin.
Hydrators and barrier lipids
Glycerin, hyaluronic acid, oat lipids and other barrier-supporting ingredients help counter the higher moisture loss that happens overnight, so you wake up with skin that feels soft and comfortable.
How to choose a night serum for your skin type
- Dry or dehydrated skin: prioritize hydrators and barrier lipids alongside a reparative active.
- Sensitive skin: look for fragrance-free formulas, gentle niacinamide levels and peptides rather than high-strength retinoids.
- Oily or combination skin: choose lightweight, fast-absorbing textures that won't feel heavy under moisturizer.
- Early signs of aging: peptides and retinoids are the most popular choices for the look of fine lines and firmness.
How to apply a serum before bed
- Cleanse thoroughly to remove sunscreen, makeup and the day's buildup so your serum can absorb.
- Apply your serum to clean skin as the first treatment step.
- Seal with moisturizer or oil to lock in hydration overnight.
- Be consistent. Applying your routine at about the same time each evening keeps it aligned with your skin's natural rhythm.
Our night serum: Polar Night Renewal Serum
Polar Night Renewal Serum was designed specifically for skin's overnight renewal window. It combines gold-encapsulated signal peptides, carrier peptides, 2.5% niacinamide and Nordic oat lipids, released gradually through our patent-pending Okosu™ delivery system. It's fragrance-free, vegan and suitable for sensitive skin. In a six-week third-party clinical study of 30 participants, skin firmness increased 43% and moisture increased 20%.
FAQ
Should I use a serum or a night cream?
Ideally both. A serum delivers concentrated actives, and a moisturizer or night cream seals in hydration on top. Read our guide to circadian skincare vs. night cream.
Can I use more than one serum at night?
You can, but keep it simple. Layering too many actives increases the chance of irritation. One well-formulated treatment serum is usually enough.
How long before bed should I apply my serum?
Applying your routine 20 to 30 minutes before sleep gives products time to absorb before your face meets your pillow.