Yes, according to the provided reference, you can certainly use a PHA product every day (which would include every night) after gradually introducing it to your routine over a couple of weeks.
Understanding PHA Usage
Polyhydroxy Acids (PHAs) are a type of chemical exfoliant known for being gentler than Alpha Hydroxy Acids (AHAs) due to their larger molecular size. This makes them suitable for many skin types, including sensitive skin. However, like any active ingredient, it's best to introduce them gradually to allow your skin to adjust.
Recommended Routine Progression
The reference suggests a specific timeline for incorporating PHA products into your skincare routine:
- Start: Begin by using the PHA product at night. The reference recommends this to avoid potential inflammation during sun exposure.
- After ~1 Week: Increase usage to every other day.
- After ~2 Weeks: If your skin tolerates it well and "you feel like your skin needs it," you can increase usage to every day.
The reference explicitly states: "After about a week, you can up your usage to every other day, and after two weeks, you can certainly use a PHA every day if you feel like your skin needs it." Using a PHA every day includes using it every night.
Table: Suggested PHA Introduction Timeline
| Time Period | Suggested Frequency | Time of Day Recommendation |
|---|---|---|
| First Week | Daily | Night |
| Second Week | Every Other Day | Morning or Night |
| After 2 Weeks | Daily (if needed) | Morning or Night |
Note: The reference specifically recommends starting with nighttime use for the first week.
Key Considerations
- Listen to Your Skin: The ability to use PHA every day depends on how your skin responds. If you experience irritation, redness, or dryness, scale back your usage.
- Sun Protection: While PHAs are less photosensitizing than some other acids, always use sunscreen daily when using any exfoliant, especially when using it in the morning.
By following a gradual introduction as outlined in the reference, you can determine if daily (or nightly) use of PHA is suitable for your skin.
