Retinol is best used at night due to two key reasons: to avoid interference with other skincare products and to prevent its breakdown by sunlight.
Avoiding Product Conflicts
Using retinol at night helps to avoid potential irritation caused by mixing it with certain other skincare ingredients commonly used during the day.
Potential daytime product interactions:
- AHAs (Alpha Hydroxy Acids): Combining retinol with AHAs can heighten the risk of skin irritation and sensitivity.
- Vitamin C: Both retinol and Vitamin C are potent ingredients that can become less effective and more irritating when applied together.
- Benzoyl Peroxide: Using benzoyl peroxide and retinol concurrently can lead to excessive dryness, redness, and peeling.
Preventing UV Breakdown
Retinol is sensitive to sunlight and can degrade when exposed to UV radiation, rendering it less effective.
Effects of Sunlight on Retinol:
- Reduced Potency: Sunlight degrades retinol, reducing its effectiveness and benefits.
- Increased Irritation: When retinol breaks down due to UV exposure, it can become more irritating to the skin.
- Optimal Absorption: Applying at night allows it to work its magic undisturbed and in the dark, which means it is more readily absorbed.
Summary Table
| Reason | Explanation |
|---|---|
| Avoid Product Interference | Prevents irritation and conflicts when used with other actives like AHAs, Vitamin C & Benzoyl Peroxide. |
| Prevent UV Breakdown | Retinol's potency is reduced when exposed to sunlight; night application maximizes effectiveness. |
By using retinol at night, you can ensure it works efficiently and effectively, minimizing irritation and maximizing results. It is important to slowly introduce retinol into your routine so your skin can adjust.
