Vitamin C + AHA/BHA
Vitamin C + AHA/BHA — a pairing of an antioxidant with chemical exfoliants such as glycolic, lactic, or salicylic acid that resurface the skin. All are acidic and potent, so combining them requires care to avoid over-exfoliation or irritation. Many routines separate them to different days or times.
Key points
- AHAs like glycolic and lactic acid exfoliate the surface, while BHAs like salicylic acid penetrate oil to clear pores.
- Layering vitamin C with acids can raise the risk of stinging, redness, or barrier disruption for sensitive skin.
- Some people use exfoliating acids at night and vitamin C in the morning to keep the two apart.
- Careful frequency and always following with sunscreen help manage sensitivity when using these actives.
Frequently asked
Can I use vitamin C with AHAs or BHAs?
It is possible, but because all are acidic and active, spacing them out or alternating days is often recommended to avoid irritation.
How do I avoid over-exfoliating?
Limit acid use to a few times per week, watch for signs of irritation, and always apply broad-spectrum sunscreen during the day.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
