Why your skin changes in autumn
- Reduced humidity: The air carries less moisture, leaving skin parched.
- Temperature swings: Moving from warm outdoor air to heated indoor spaces stresses the skin barrier.
- Sun exposure shifts: Even as UV levels drop, skin may react to lingering summer sun or sudden cool winds.
Scientific insight
Seasonal changes can have a measurable impact on the skin. In a one-year longitudinal study, researchers found that transepidermal water loss (TEWL) was significantly higher in winter than in summer – 22.33 g/m²/h compared with 15.08 g/m²/h, an increase of approximately 48%. TEWL measures the amount of water lost through the skin and is commonly used as an indicator of skin barrier function. Frontiers in Microbiology
Another study of Caucasian women in Central Europe found that skin hydration and sebum production were lower during winter, with seasonal changes also associated with temperature and humidity. PubMed
These findings help explain why skin may feel drier and tighter during the colder months, when lower temperatures, reduced humidity and indoor heating can place greater demands on the skin barrier.
What your skin needs now
- Extra hydration: Focus on products that lock in moisture and strengthen the skin barrier.
- Gentle care: Avoid harsh cleansers or over-exfoliation; your skin’s barrier is already under stress. Cleansing with enzymes is gentle.
- Barrier support: Bioactive ingredients, including peptides and hyaluronic acid, help maintain elasticity, calm irritation, and improve moisture retention.
- Layering: Use serums under moisturizers to maximize hydration, and don’t forget delicate areas like lips and hands.
Hyaluronic acid – A key ingredient in autumn
Hyaluronic acid (HA) truly shines in autumn, when cooler air, lower humidity, and indoor heating start to dry out the skin. Its ability to attract and retain moisture helps counter seasonal dryness and strengthen the skin barrier. While HA is beneficial year-round, fall is the season when your skin will notice the most difference.
Many people assume all hyaluronic acids are the same, but they vary widely in molecular size, structure, and effectiveness. To help you navigate the differences, we’ve put together the table below, showing the key types, their INCI names, and main benefits. Knowing these differences helps you choose the most effective form for long-lasting hydration.
Types of hyaluronic acid
| Type of Hyaluronic Acid | INCI Name | Key Benefits |
|---|---|---|
| High Molecular Weight HA | Sodium Hyaluronate | Locks in surface moisture for instant hydration |
| Low Molecular Weight HA | Sodium Hyaluronate | Penetrates deeper layers to improve elasticity and firmness |
| Hydrolyzed HA | Hydrolyzed Hyaluronic Acid | Smaller fragments penetrate deeper, smoothing and softening skin |
| Cross-linked HA | Sodium Hyaluronate Crosspolymer | Forms a network for slow-release, long-lasting hydration and plumping |
| Acylated HA | Sodium Acetylated Hyaluronate |
Chemically optimized for enhanced stability and better efficacy including longer-lasting hydration compared to conventional hyaluronic acids |
| Full Spectrum HA |
Sodium Hyaluronate (the INCI name is the same as for low and high, so look deeper to see whether it contains multiple molecular weights for a broader hydrating effect). |
Combines different molecular weights for surface and deep hydration, improving elasticity and firmness |
Table prepared by Bioli.
For a deeper dive into decoding ingredient labels and understanding what’s in your skincare products, check out our previous article: Unfolding the Ingredient Label: A Guide to Decoding the INCI.
Why Acylated and Full spectrum hyaluronic acid stands out
Some conventional forms of HA provide only a brief moisture boost before evaporating, leaving skin thirsty again. Acylated hyaluronic acid delivers longer-lasting hydration – some up to 8 hours of sustained hydration. Its optimized structure enhances water retention and supports the skin barrier, keeping skin plump, smooth, and comfortable throughout the day – even in dry, autumn conditions. Choosing an advanced form ensures long-lasting hydration rather than a temporary fix.
Products with Acylated and Full spectrum hyaluronic acid stands out
Check out Bioli Moisturizing and Protecting Day Cream, formulated with biotech acetylated hyaluronic acid, delivering up to 8 hours of continuous hydration and barrier support, especially needed in autumn’s dry air.
Check out Bioli Clarifying Cleanser and Exfoliator, and Strengthening Serum formulated with biotech-derived multi-weight hyaluronic acid. Unlike regular single-weight hyaluronic acid, it contains multiple molecular weights that work across different layers of the skin, helping to deliver deeper hydration while cleansing and leaving skin soft, refreshed and never dry or tight.
Additional tips for seasonal changes
- Swap lightweight summer creams for richer, nourishing moisturizers.
- Continue using sunscreen, even as the sun softens, to protect against lingering UV damage.
- Drink plenty of water.
- Air out your home several times a day to counteract dry indoor air, and turn down the radiators.
Autumn is the perfect time for a skin reset, giving your skin the moisture and care it needs to stay healthy, plump, and comfortable through the cooler months. By adjusting your routine to meet seasonal needs – especially with hyaluronic acid – you’re helping your skin thrive through autumn.
