How To Layer The Ordinary Skincare Products

The Ordinary has made high-performance skincare accessible to everyone — but its wide range of actives, acids, retinoids, and serums can be genuinely confusing to use. Apply them in the wrong order and you'll reduce their effectiveness. Combine the wrong ingredients and you could irritate your skin.

This guide walks you through exactly how to layer The Ordinary products in the correct order, which combinations to avoid, and how the Skincare Routine app makes all of this effortless by doing the work for you.

The golden rule: lightest to heaviest

Before getting into individual products, the single most important principle for layering any skincare is this: apply products from lightest to heaviest texture. Lighter, water-based formulas absorb quickly and penetrate the skin's surface most effectively. Thicker, oil-based or emollient products form a seal that can block lighter formulas from reaching the skin if applied first.

The order looks like this:

Cleanser
Toner / Essence (water-based hydrators)
Serums (water-based first, then anhydrous/oil-based)
Oils
Moisturiser
SPF (AM only)

This framework applies to almost every The Ordinary routine. Let's go through it step by step.

Step 1: Cleanser

Every routine — morning and evening — starts with a clean face. The Ordinary doesn't sell a dedicated cleanser, but this step sets the stage. Any clean, balanced cleanser works. Pat dry before moving to the next step.

Step 2: Toner and essence

AM and PM

These go on immediately after cleansing, while your skin is still slightly damp.

Key The Ordinary products at this step:

Natural Moisturizing Factors + HA — An excellent lightweight hydrator that works best applied early so it can sink in before heavier layers.
Hyaluronic Acid 2% + B5 — A serum by texture but often best used early given how water-thin it is. It draws moisture into the skin, so apply it before occlusives.
Marine Hyaluronics — Another ultra-lightweight hydrating serum that sits well at this stage.

Tip: If you use Hyaluronic Acid, apply it to damp skin and follow immediately with a moisturiser to seal in the hydration. Left to dry in a low-humidity environment, HA can actually draw moisture out of the skin.

Step 3: Serums — water-based first, then anhydrous

This is the most important — and most complex — step in a The Ordinary routine. Most of The Ordinary's well-known actives are serums, and the order within this single step matters enormously.

The cardinal rule: no more than three serums at once. Using too many actives simultaneously overloads the skin and can trigger irritation. DECIEM themselves recommend a maximum of three serums in any one routine. The Skincare Routine app will warn you if you've added more than three serums to a single routine.

Water-based serums (apply first within this step)

Niacinamide 10% + Zinc 1% — Brightening, oil-controlling, and pore-minimising. Apply this early in your AM routine.
Alpha Arbutin 2% + HA — A gentle brightening serum, best in the AM.
Azelaic Acid Suspension 10% — A light suspension that targets blemishes and uneven tone.
"Buffet" — A multi-peptide serum. Peptides are generally morning-friendly and layer well with most ingredients.
Argireline Solution 10% — A peptide serum targeting the appearance of expression lines.

Anhydrous and oil-based serums (apply after water-based)

Retinol 0.2% / 0.5% / 1% in Squalane — A potent retinoid. PM only. Apply after any water-based serums.
Granactive Retinoid 2% / 5% in Squalane — DECIEM's gentler retinoid option, good for beginners. PM only.
Granactive Retinoid 2% Emulsion — A softer emulsion format. PM only, less irritating.
100% L-Ascorbic Acid Powder — Pure Vitamin C. Mixes with other water-based products immediately before application. PM preferred to avoid interaction with other morning actives.
Ascorbyl Glucoside Solution 12% — A stable Vitamin C derivative, gentler and suitable for AM.
Retinol 0.5% in Squalane — PM only.

Step 4: Oils

AM and/or PM

Oils seal in the layers applied beneath them. Apply them after all serums.

Key products:

100% Plant-Derived Squalane — A lightweight, non-comedogenic oil that suits most skin types. Excellent for sealing in moisture.
100% Organic Cold-Pressed Rose Hip Seed Oil — Rich in linoleic acid and retinoids. PM preferred.
100% Plant-Derived Hemi-Squalane — An even lighter, fast-absorbing option.

Step 5: Moisturiser

AM and PM

After oils come creams and emulsions. These form the main protective barrier layer.

Key products:

Natural Moisturizing Factors + HA (cream formula) — Mimics the skin's natural moisturising factors.
Buffet + Copper Peptides 1% — A richer treatment/moisturiser option.

Step 6: SPF (AM only)

Always the last step in your morning routine. Nothing goes on top of SPF in the AM — this includes Vitamin C derivatives, which should be applied before SPF, not after.

The Ordinary sells SPF products. Whatever you use, SPF should be the very last product you apply in the morning.

The conflicts you must know about

The Ordinary's range is powerful precisely because it's packed with actives. But some combinations genuinely don't work and can cause irritation or neutralise each other's benefits. These are the most important ones:

Retinoids and direct acids don't mix

Avoid using retinoids (Retinol, Granactive Retinoid) in the same routine as direct acids such as:

AHA 30% + BHA 2% Peeling Solution
Glycolic Acid 7% Toning Solution
Lactic Acid 5% / 10%
Salicylic Acid 2% Solution
Mandelic Acid 10% + HA

Retinoids work by mildly increasing skin cell turnover. Applying them alongside strong exfoliating acids in the same routine can over-exfoliate, damage the skin barrier, and cause redness and sensitivity. Keep them on separate days.

Pure Vitamin C conflicts

100% L-Ascorbic Acid Powder and Ethylated AA 15% (pure, direct forms of Vitamin C) conflict with several other actives:

Niacinamide 10% + Zinc 1% — Pure Vitamin C and Niacinamide can reduce each other's efficacy and cause flushing. Keep them in separate routines (Vitamin C PM, Niacinamide AM).
EUK 134 0.1% — EUK 134 is an antioxidant that's destabilised by Vitamin C. Use them in separate routines.
Copper Peptides — Vitamin C can interfere with the copper complex.
Direct acids — Layering pure Vitamin C with AHAs/BHAs can cause irritation.

Good news: Derivative Vitamin C (such as Ascorbyl Glucoside 12%, MAP 10%, or Ascorbyl Tetraisopalmitate 20%) is far more stable and only conflicts with Niacinamide. These gentler forms are a good starting point if you're new to Vitamin C.

Retinoids and Copper Peptides

Keep Copper Peptides away from retinoids. Use them in separate routines or on alternate days.

AM vs PM: a complete example routine

Getting this right becomes much easier when you divide your products clearly between morning and evening.

Example AM routine

Cleanse
Marine Hyaluronics (if using)
Niacinamide 10% + Zinc 1%
Ascorbyl Glucoside Solution 12% (stable Vitamin C derivative)
"Buffet" peptide serum
Natural Moisturizing Factors + HA
SPF

Example PM routine

Cleanse
Hyaluronic Acid 2% + B5
Granactive Retinoid 2% Emulsion (or Retinol 0.2% if your skin is used to retinoids)
100% Plant-Derived Squalane
Natural Moisturizing Factors + HA

Note: Don't use exfoliating acids (AHA/BHA) on the same evenings you use retinoids. Rotate them across the week instead.

How the Skincare Routine app handles all of this for you

Keeping track of every conflict, every layering order rule, and every AM/PM restriction is genuinely difficult — even for experienced skincare enthusiasts. That's exactly why the Skincare Routine app exists.

Here's what it does automatically:

All The Ordinary products are pre-loaded

Every product in The Ordinary range comes pre-loaded in the app, complete with its recommended layer step, time of day, and conflict rules. You don't need to look anything up.

Your routine is auto-sorted into the correct order

When you add products to your routine, the app automatically places them in the right layer order — water-based serums before anhydrous serums, oils before moisturisers, moisturisers before SPF. The ordering algorithm is based on DECIEM's own recommendations. If you'd prefer a different order, you can re-arrange it manually at any time.

Conflicts are flagged in real time

As you tick off products during your morning or evening routine, the app watches for incompatible combinations. If you tick Niacinamide and then go to tick a pure Vitamin C product:

A red checkbox means there's a hard conflict — using that product now isn't recommended.
An orange checkbox means there's a caution — it's worth reading the reason before proceeding.

The conflict system is built from DECIEM's own guidelines and is kept up to date in the app.

The three-serum rule is enforced

The app keeps track of how many serums you have in a single routine and warns you if you've exceeded three — following DECIEM's own recommendation not to overload your skin.

Alternating treatments, made easy

For products you use on alternate days or only certain days of the week (like exfoliating acids or retinoids), the app shows a six-day usage history for each product. A quick glance tells you whether you used it last night, so you can decide whether it's a retinoid night or an acid night. You can also schedule products for specific days of the week or set them to appear every two days automatically.

Track your skin's progress

Every time you complete your AM or PM routine, you can rate how your skin looks and feels. Over time, this builds a log that helps you spot which products make a real difference for your skin.

Available on iOS and Android

The app is available at skincareroutine.app or search "Skincare Routine" on the App Store or Google Play.

Summary: The Ordinary layering order

Step	Products	Time
1. Cleanser	Any balanced cleanser	AM + PM
2. Toner / Essence	Hyaluronic Acid 2% + B5, Marine Hyaluronics	AM + PM
3. Water-based serums	Niacinamide 10%, Ascorbyl Glucoside 12%, "Buffet", Alpha Arbutin 2%	AM + PM
4. Anhydrous serums	Granactive Retinoid, Retinol, Pure Vitamin C	PM (retinoids/pure Vit C)
5. Oils	Squalane, Rose Hip Seed Oil	AM + PM
6. Moisturiser	NMF + HA, Buffet + Copper Peptides	AM + PM
7. SPF	Any broad-spectrum SPF 30+	AM only

The Ordinary is one of the most effective skincare ranges available at any price point — but it rewards users who understand the science. Get the order right, respect the conflict rules, and let the Skincare Routine app do the heavy lifting.