How long does tretinoin take to show results?

Most users see initial texture improvements and fewer breakouts within 8–12 weeks of consistent nightly use. Fine line reduction and hyperpigmentation improvements typically appear at 6 months. Full collagen remodeling benefits take 12–24 months. Stick with it through the purge phase (weeks 2–6), this is temporary and means it is working.

What moisturizer works best with tretinoin?

Use a simple, fragrance-free, ceramide-rich moisturizer. Top choices: CeraVe Moisturizing Cream, Vanicream Moisturizing Skin Cream, or La Roche-Posay Toleriane Double Repair. Apply before tretinoin (the sandwich method) to buffer irritation, or wait 20–30 minutes after tretinoin. Avoid occlusives like petrolatum directly over tretinoin, they can increase penetration and irritation. Niacinamide-containing moisturizers are a good pairing for their barrier-repairing properties.

Can you use tretinoin every night?

Eventually yes, but start slow: use tretinoin 2–3 nights per week for the first 4–6 weeks, then increase to every other night, then nightly as tolerated. Most people reach nightly use by month 3–4. Signs you are progressing too fast: persistent redness, flaking, or burning beyond the first few minutes after application. Slow down rather than stopping entirely if irritated. SPF 30+ every morning is mandatory with tretinoin, it increases UV sensitivity.

tretinoin · Review

Paula's Choice 2% BHA Liquid Review: The Cult Pore Fix

Paula's Choice 2% BHA Liquid Exfoliant has 100k+ reviews and a near-religious following. Here's the honest take after 12 weeks of daily use.

Our verdict

Paula's Choice Skin Perfecting 2% BHA Liquid Exfoliant

$35

9.3

out of 10

Check price →

Last updated April 13, 2026 · 5 min read · First published Apr 2026

Heads up: this post has affiliate links. We may earn a small commission if you buy something, at no extra cost to you. We only link to stuff we'd actually tell a friend about. Prices shown are approximate and change often; check the retailer for current pricing.

What we like

✓ 2% pure salicylic acid in low-alcohol formula
✓ Daily-use friendly without over-drying
✓ Visible pore size reduction at 4-6 weeks
✓ Backed by 25+ years of customer data

What bugs us

✗ $35 for 4oz is mid-premium pricing
✗ Slight chemical scent (it's the BHA)
✗ Can sting around the eyes if applied too close

The short answer

Paula’s Choice 2% BHA Liquid is the cult salicylic acid product with 100k+ Sephora reviews. 2% pure salicylic in alcohol-light formula. Daily-use safe, visible pore reduction at 4-6 weeks. At $35 it’s the standard everyone else copies.

This is the BHA exfoliant the entire skincare community defaults to. Earned reputation.

Why it works

The formula is dead simple: 2% salicylic acid (the maximum OTC concentration), in a hydrating gel-like base with green tea extract for inflammation control. No filler ingredients.

What you don’t get:

Aggressive alcohol that strips skin
Fragrance
Color
Drying agents

What you do get: pure pore-clearing BHA at the right concentration.

12-week results

Week 2: blackheads on nose visibly reducing
Week 4: pore size on T-zone smaller
Week 6: skin texture noticeably smoother
Week 12: maintained baseline. Less acne breakthrough.

How to use it

Apply with cotton round to clean, dry skin in the evening. Daily use OK for most. If retinoid evening: alternate nights (BHA Mon/Wed/Fri, retinoid Tue/Thu/Sat).

Premium Beauty sourcing

This is sold via Amazon Premium Beauty. Look for the Premium Beauty badge on the listing.

Check current price on Amazon →

The verdict

Score: 9.3/10. The cult BHA product earns its hype. Worth $35 if you have pore concerns or oily skin. Naturium BHA at $14 is the budget dupe.

Ready to buy?

Grab the Skin Perfecting 2% BHA Liquid Exfoliant on Amazon

Check current price →

The Glow-Up · free challenge

Before you buy, get the free 7-day Glow-Up

We test tretinoin products for 8+ weeks before we recommend them. Take the free 7-day challenge on what actually works, then one honest email a week. No BS.

Free. Unsubscribe any time. We never sell your data.

Related reviews

Brand guide

Everything else Paula's Choice makes that's actually worth buying

See the Paula's Choice guide →

Augustinus Bader · tretinoin

The Cream

Augustinus Bader The Cream is the celebrity-endorsed luxury moisturizer. Here's the honest 90-day test, and whether the TFC8 tech delivers.

8.8/10Read review →

Drunk Elephant · tretinoin

Protini Polypeptide Cream

Drunk Elephant's $68 Protini cream promises peptide-fueled firming. Here's the honest 8-week review.

8.5/10Read review →

Kiehl's · tretinoin

Ultra Facial Cream

Kiehl's Ultra Facial Cream has been a top-seller since 1990. Here's whether the $40 squalane-rich classic is worth it in 2026.

8.5/10Read review →

Premium Beauty

More Premium Beauty picks

If money isn't the object, these are our favorite Premium Beauty products across the site.

CurrentBody

~$460

Skin LED Light Therapy Mask Series 2

236 LEDs. Red 633nm + NIR 830nm. Flexible fit.

Buy on Amazon →

Dr. Dennis Gross

~$455

DRx SpectraLite FaceWare Pro

Rigid shell. 100 red + 62 blue LEDs. Sephora's bestseller.

Buy on Amazon →

Omnilux

~$440

Contour Face LED Mask

FDA-cleared flexible LED mask. 633nm + 830nm.

Buy on Amazon →

Therabody

~$400

TheraFace PRO

Microcurrent, red light and percussive therapy in one handheld. Replaces three single-purpose gadgets.

Buy on Amazon →

Therabody

~$400

TheraFace PRO

Red light + microcurrent + percussive + cleansing. Sci-fi gadget.

Buy on Amazon →

SkinMedica

~$295

TNS Advanced+ Serum

Dual-chamber growth factor + peptide serum. Actually worth the splurge.

Buy on Amazon →