Can you use adapalene with squalane?
The chemistry
Adapalene is a third-generation retinoid that binds selectively to certain retinoic acid receptors, normalising how follicle cells shed and calming inflammation in acne (Irby 2008). Its main side effects are predictable: dryness, scaling and stinging, worst in the first two to four weeks. Adapalene is also more chemically stable than tretinoin, resisting breakdown from light and oxidisers (Martin 1998), so there is no worry about squalane degrading it. Squalane, being saturated, is itself stable and light (Huang 2009). The pairing is therefore purely about tolerance. You can apply squalane after adapalene once the gel dries, or use it as a buffer before adapalene on very dry or reactive skin, which modestly reduces irritation at the cost of a little penetration.
Buffering
Squalane before adapalene softens the sting; after adapalene it seals moisture. Both are valid.
Stability
Adapalene is not broken down by oils or light the way tretinoin is (Martin 1998).
Pea size
One pea-sized amount covers the face; extra adapalene only adds peeling.
Common mistakes
Retinoid users commonly respond to peeling by scrubbing it off, which deepens the irritation. A few drops of squalane flatten flakes and make them less visible. Another mistake is spot-applying adapalene only on pimples; it is a preventive treatment and needs to go across the whole acne-prone area. Many stop in week three when the skin looks worse; that early purge and dryness typically settles by weeks four to six, and the oil helps you get there. Don't layer squalane so thickly that you skip sunscreen in the morning, since retinoid-treated skin is more sun sensitive.
Your routine
Morning
- Gentle cleanser
- Squalane or light lotion
- SPF 30+
Evening
- Cleanse, dry 10 minutes
- Pea of adapalene 0.1%
- Squalane on top once absorbed
Sample week
Weeks 1 to 2: adapalene every other night, squalane nightly. Move to nightly adapalene once flaking settles.
Go slower if
Go slower with eczema, rosacea or very dry skin, using adapalene every third night with squalane underneath. Adapalene is a retinoid and is usually avoided in pregnancy; speak to your doctor. Stop for severe swelling or blistering.
Evidence strength
Strong for adapalene in acne (Irby 2008). Squalane's safety is well established (Fiume 2023). The buffering technique is common dermatology advice, but no trial has tested squalane specifically with adapalene.
FAQ
Before or after adapalene?
After for most people. Before if you are very dry or sensitive.
Will squalane clog pores while I treat acne?
It is generally considered low risk, but watch for new bumps.
Can I mix them in my hand?
You can, though it dilutes the dose. Layering is more predictable.
When will adapalene work?
Plan on 8 to 12 weeks for a fair judgement (Irby 2008).
Does squalane go off or smell over time?
Because it is saturated it resists turning rancid, which is one reason it is a common carrier oil (Huang 2009). Store it away from heat anyway.
Related combinations
- RetinolNo, not together
- Vitamin CYes, with timing
- NiacinamideYes
- TretinoinNo, not together
- Salicylic AcidYes, with timing
- Hyaluronic AcidYes
- RetinolYes
- Glycolic AcidYes, with timing
Sources
- Irby CE, et al. A review of adapalene in the treatment of acne vulgaris. J Adolesc Health. 2008;43(5):421-4.
- Martin B, et al. Chemical stability of adapalene and tretinoin when combined with benzoyl peroxide in presence and in absence of visible light and ultraviolet radiation. Br J Dermatol. 1998;139 Suppl 52:8-11.
- Fiume M, et al. Squalane and squalene. Int J Toxicol. 2023;42(3 Suppl):107S-109S.
- Huang ZR, Lin YK, Fang JY. Biological and pharmacological activities of squalene and related compounds: potential uses in cosmetic dermatology. Molecules. 2009;14(1):540-554.