This is an exfoliating toner that removes dead skin cells and helps improve uneven texture and dullness. The word 'toner' gives it a fairly modest job title for something responsible for removing dead skin cells.2

Do I need to work up to every day?

No. Daily use is an option, not a requirement. Your exfoliation schedule should depend on your skin and the product, rather than a fixed deadline for reaching nightly use. General glycolic acid guidance offers an even slower starting point of once or twice a week. If you want a cautious introduction, start there instead of forcing three applications into your first week.34

How to apply it

  1. 1Patch test first. Apply a small amount to clean skin on your upper forearm, keep the area dry and rinse after 24 hours. Do not use the toner if redness, burning, itching, blisters or irritation develop.
  2. 2On your chosen evening, apply the toner to your face and neck with your fingers or a cotton pad. Avoid the eye area and contact with your eyes.
  3. 3Leave the toner on rather than rinsing it off during normal use.
  4. 4Follow with moisturizer. Exfoliation can dry the skin, so hydration belongs in the routine even if your skin is oily.
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Use broad spectrum SPF 30 or higher during the day, and reapply every two hours outdoors. Glycolic acid increases sensitivity to sunlight. Wear protective clothing and limit sun exposure while using the toner and for one week after stopping. Applying the toner at night does not remove the need for daytime sun protection.46

What if I already use other active ingredients?

Do not put this toner in the same routine as other exfoliating acids, such as salicylic acid, or retinoids. Use them in separate routines instead. The Ordinary also lists direct vitamin C, peptides, copper peptides, EUK and niacinamide powder as incompatible combinations. That powder restriction is specifically about niacinamide powder, not a blanket instruction to avoid every niacinamide product.12

Prescription retinoid creams, retinol and benzoyl peroxide can make skin more sensitive or cause peeling. Adding exfoliation can worsen dryness or cause breakouts. If these are already part of your routine, resolve whether exfoliation is suitable before increasing the toner frequency; a dermatologist can help make that decision.3

When should I skip it or stop?

Do not use this toner on sensitive, peeling or damaged skin, including open wounds or sunburn. If the toner irritates your skin or eyes, rinse thoroughly, stop using it and consult a doctor. Do not treat irritation as a reason to keep applying it until your skin adjusts.23

General glycolic acid guidance calls for caution with dry skin, rosacea, eczema or an active skin infection. Low concentrations are generally considered safe in pregnancy, but check with your healthcare provider before using glycolic acid if you are pregnant or breastfeeding.4

How long should I give it?

For glycolic acid products used at home, brighter skin or more even pigmentation can take several months of consistent use. The goal is smoother, more even looking skin, not a promotion for the toner to chief executive of your routine.24

If you mean scalp use rather than face use, the schedule is different: The Ordinary directs application to a dry scalp three times a week. Distribute it from front to back with the nozzle, massage thoroughly and leave it on.1

Where this answer comes from

  1. 1Peeling-Toner mit Glycolic Acid 7%theordinary.com
  2. 2Glycolic Acid 7% Exfoliating Tonertheordinary.com
  3. 3How to safely exfoliate at homeaad.org
  4. 4Glycolic Acid: Benefits for Skin and How To Usehealth.clevelandclinic.org
  5. 5How to control oily skinaad.org
  6. 6Alpha Hydroxy Acidsfda.gov