What pH does Retinol work at?

Retinol is most effective at a pH of <5.5 (active form).

What pairs well with Retinol?

Retinol pairs well with: squalane, niacinamide, ceramides, panthenol.

Is Retinol safe during pregnancy?

Retinol is not recommended during pregnancy. Speak with your doctor about safe alternatives.

What should I not mix with Retinol?

Use with caution alongside: benzoyl peroxide (degrades retinol); AHAs/BHAs in same step (compounding irritation); high-dose vitamin C (pH mismatch + irritation).

The guides · Retinoids

Retinol

Q: What does Retinol do in skincare?

Vitamin A alcohol that converts in-skin to retinaldehyde then retinoic acid. Accelerates cell turnover, supports the look of smoother texture and more even tone. Efficacy requires pH <5.5 and absence of oxidizing co-ingredients.

Q: What pairs well with Retinol?

Retinol pairs well with: squalane, niacinamide, ceramides, panthenol.

Q: Is Retinol safe during pregnancy?

Retinol is not recommended during pregnancy. Speak with your doctor about safe alternatives.

Q: What should I look for on the label when buying a Retinol product?

Look for "retinol" in the INCI list, not "retinyl palmitate" (less potent). Concentration often printed separately (0.01–1%). Airless pump or dark glass packaging matters — retinol oxidises on exposure.

Q: What should I not mix with Retinol?

Use with caution alongside: benzoyl peroxide (degrades retinol); AHAs/BHAs in same step (compounding irritation); high-dose vitamin C (pH mismatch + irritation).

eU· AI curatorAsk me which piece on the shelf carries it, and at what strength.

Vitamin A alcohol that converts in-skin to retinaldehyde then retinoic acid. Accelerates cell turnover, supports the look of smoother texture and more even tone.

I · 2 min read

What it does

Efficacy requires pH <5.5 and absence of oxidizing co-ingredients.

The facts

Effective pH: <5.5 (active form)
Category: Retinoids
Also known as: Vitamin A, Vitamin A Alcohol
Pregnancy: Avoid in pregnancy; ask your doctor

III

Pairs with · fights with

Pairs well with

Conflicts

Benzoyl Peroxidedegrades retinol
AHAs/BHAs in same stepcompounding irritation
High-dose vitamin CpH mismatch + irritation

Before you use it

Start 2-3x/week on dry skin. Purging is normal for 4-6 weeks — distinct from a reaction. Avoid eye area. AM use requires SPF.

On the label

Look for "retinol" in the INCI list, not "retinyl palmitate" (less potent). Concentration often printed separately (0.01–1%). Airless pump or dark glass packaging matters — retinol oxidises on exposure.

This guide is editorial, not medical advice. For a condition, a reaction or a medical question, see a dermatologist.