As a nurse I understand skin healing and barrier function, and as a cosmetologist/hairstylist I’ve used acids on hundreds of real people. After testing everything out there, the single glycolic product I actually buy with my own money is The Ordinary Glycolic Acid 7% Exfoliating Toner. No sponsorship, no cute packaging—just the one that actually works with a correct pH (~3.6) and honest free-acid value. It’s clean, the pH is right, and it just works.

1. The Nurse Hat: What Glycolic Is Actually Doing

• Smallest AHA → deepest penetration of the bunch

• Dissolves the “glue” (desmosomes) holding dead cells together

• Proven to increase cell turnover 25–50% at 7–15%

• Stimulates collagen and glycosaminoglycan (most common form being hyaluronic acid) with consistent use of 6-12 months

• Drops skin pH low enough to keep Cutibacterium acnes in check (is the bacteria that lives deep inside your pores and hair follicles.

I still won’t use it on active rosacea, open wounds, or anyone within 6 months of Accutane.

The Ordinary Glycolic Acid 7% Exfoliating Toner

2. The Hairstylist Hat: Scalp Game-Changer

I started decanting The Ordinary 7% into spray bottles for scalp treatments years ago. Five-minute massage before every color service lifts minerals, old dry shampoo, and sebum so color takes evenly and shine is insane. Clients of mine with oily or flaky scalps who added this weekly 7% glycolic treatment almost always told me they ended up needing their medicated shampoos way less — most said 70–80% less.”

Rule: Never use the same day as bleach or high-heat styling if you’re going above 7%.

3. The Cosmetologist Hat: My Exact Rules (Sign Them in Blood)

• SPF 50+ every morning, reapply, no excuses

• Start with every-other-night for two weeks, then nightly if tolerated (always listen to your skin to prevent damaging your skin barrier)

• Apply only on completely dry skin and wait 20–30 min after cleansing (damp skin + low pH = unnecessary sting)

• Never combine with physical scrubs or cleansing brushes same day

• Anything past 2 minutes of active stinging is your skin voting with pain. Listen to it — back off, or rinse right away— you went too hard

My Current Routine (Yes, With The Ordinary)

Night (2-3x week): Cleanse → The Ordinary Glycolic 7% (wait 2 min) → hyaluronic acid → ceramide moisturizer (add tretinoin a few nights if you’re already on it) - but honestly, the glycolic alone is more than enough for most people.

Scalp (once weekly): Spray The Ordinary 7% on dry scalp, massage, leave 10 min, shampoo out

Here’s the exact bottle I buy (Amazon link – you’re welcome): The Ordinary Glycolic Acid 7% Exfoliating Toner

Respect it like the prescription-grade ingredient, and it will give you the clearest, glowiest skin and scalp of your life.

Stay glowing (the smart way), — Your triple-licensed, slightly obsessed friend

Sam - Licensed Nurse, Cosmetologist and Hairstylist

Sam – Founder of Glow Formula Co