Quick answer

Use Paula's Choice 4% BHA Advanced Exfoliating Serum Toner after cleansing, on dry skin, once daily or as tolerated. Start slowly to let your skin adjust.

Why start slowly with a 4% BHA toner

A 4% concentration of salicylic acid is stronger than typical over-the-counter BHA products. If you are new to chemical exfoliation or have sensitive skin, jumping in daily can cause irritation, dryness, or flaking. Begin with two or three applications per week, then gradually increase frequency as your skin builds tolerance.

When to apply in your routine

Apply the serum toner immediately after cleansing and before any other treatments or moisturizer. Using it on a completely dry face ensures even penetration. Wait about 30 seconds for the formula to absorb before layering serums or moisturizer.

Step-by-step routine

  1. Cleanse and dry your face: Wash with a gentle cleanser, then pat your skin completely dry. Applying BHA to damp skin can dilute the formula and cause uneven absorption. Always wait until skin is fully dry before applying.
  2. Apply a small amount to a cotton pad or fingertips: Saturate a cotton pad with the serum toner, or use 3–4 drops directly on clean fingertips. Sweep gently over the entire face, avoiding the eye area and any broken skin. Using a cotton pad gives more even coverage; fingertips waste less product.
  3. Let it absorb before next steps: Wait 30–60 seconds for the toner to sink in. If you apply moisturizer or serum too soon, you may dilute the BHA and reduce its effectiveness. A brief wait makes the exfoliation more consistent.
  4. Follow with moisturizer and sunscreen (AM only): Lock in hydration with a moisturizer. In the morning, always finish with broad-spectrum SPF 30 or higher, because BHA can increase sun sensitivity. Sunscreen is non-negotiable when using any exfoliating acid.
  5. Adjust frequency based on your skin's response: Start with 2–3 evenings per week. If no irritation occurs after two weeks, you can increase to nightly use. Reduce frequency if you notice redness, peeling, or stinging. More is not better; listen to your skin and scale back if needed.

Product details

  • 4% BHA Advanced Exfoliating Serum Toner: A potent leave-on BHA exfoliating serum toner that targets fine lines, rough texture, and visible signs of aging. It works deep inside pores to clear congestion while smoothing surface texture, so you get both immediate and long-term skin improvements.

    4% BHA Advanced Exfoliating Serum Toner

    4% BHA Advanced Exfoliating Serum Toner