Morning vs. Evening Skincare Routine: What Goes AM and What Goes PM

The question of which products go in the morning versus the evening is one of the most fundamental in skincare — and it's more important than it might seem. The time of day you apply certain actives affects how effective they are, how well they interact with other products, and whether they're safe to use without additional protection.

This guide provides a clear AM/PM framework for a The Ordinary-based routine, with the reasoning behind each decision.

Why timing matters

There are three main reasons why certain products are assigned to morning or evening:

1. UV sensitivity

Some actives — particularly retinoids and direct acids — increase the skin's sensitivity to UV radiation. Using them in the morning and then going outside without adequate SPF can accelerate the kind of sun damage you're trying to prevent. These products always belong in the PM.

2. Conflict management

Many of the most common ingredient conflicts are resolved naturally by separating products into AM and PM. If Vitamin C and Niacinamide conflict, putting one in each routine solves the problem without any extra effort.

3. What your skin needs at each time

At night, your skin's repair and regeneration processes are most active — making the PM the right time to use actives that support these processes (retinoids, stronger exfoliants). In the morning, the priority is protection: antioxidants, hydration, and SPF.

AM routine: protection and preparation

Your morning routine should focus on preparing and protecting your skin for the day ahead. The goal is to hydrate, apply any morning-compatible actives, and always finish with SPF.

Always AM

Niacinamide 10% + Zinc 1%

The ideal morning serum for most people. Controls sebum throughout the day, minimises pores, and brightens over time. Niacinamide in the AM is also strategically useful because it separates it from pure Vitamin C, which is PM-friendly.

Alpha Arbutin 2% + HA

A gentle brightening serum targeting hyperpigmentation and uneven tone. It works well in the morning and layers easily with other AM products.

Hyaluronic Acid 2% + B5

Lightweight hydration. Apply to slightly damp skin after cleansing, before your other serums. Works in both AM and PM but is particularly useful in the morning to prime the skin.

"Buffet" (multi-peptide serum)

Peptides are natural candidates for the AM because they conflict with pure Vitamin C (which lives in the PM). They layer well with Niacinamide and hydrating serums.

Ascorbyl Glucoside Solution 12% (Vitamin C derivative)

A stable, derivative form of Vitamin C that works well as a morning antioxidant. Unlike pure Vitamin C, the derivative form doesn't conflict with most other AM ingredients (only Niacinamide, which can be avoided or minimised). Apply before SPF.

SPF

Always last in the morning routine. Nothing goes on top of SPF.

Can be AM or PM

Azelaic Acid Suspension 10%

No UV sensitivity issues and minimal conflict — it works well morning or evening. Many people use it in the AM.

Marine Hyaluronics

Pure hydration — flexible in either routine.

Natural Moisturizing Factors + HA

A lightweight moisturiser that works at any time of day. No conflicts or UV concerns.

PM routine: treatment and repair

Your evening routine is where the more potent and UV-sensitive actives live. Without the need for SPF, and with the skin's overnight repair cycle to work with, the PM is when stronger treatments are most effective.

Always PM

Retinoids (all forms)

All retinoids — Granactive Retinoid 2% and 5%, Retinol 0.2%, 0.5%, and 1% — are PM only. They are photosensitising (they increase UV sensitivity), and they work best during the skin's overnight regeneration cycle. Always apply SPF the following morning.

Pure Vitamin C (L-Ascorbic Acid products)

100% L-Ascorbic Acid Powder, Vitamin C Suspension 23% + HA Spheres 2%, and Vitamin C Suspension 30% in Silicone all belong in the PM. This separates pure Vitamin C from the multiple morning actives it conflicts with — Niacinamide, Peptides, EUK 134.

AHA 30% + BHA 2% Peeling Solution

Chemical exfoliants that are too strong to use before UV exposure. PM only, maximum twice per week.

Glycolic Acid 7% Toning Solution

Glycolic Acid increases photosensitivity significantly. PM only.

Lactic Acid 5% and 10%

As with all direct acids, PM preferred to avoid UV sensitivity issues.

100% Cold-Pressed Rose Hip Seed Oil

Rich in natural retinoids. PM preferred, particularly for those using it alongside other PM actives.

Can be AM or PM

Salicylic Acid 2% Solution

BHA is less photosensitising than AHAs. Many people use it in the morning. Either routine is fine.

Lactic Acid 5% (lower concentration)

Lower AHA concentrations are generally acceptable in the AM if followed by adequate SPF. PM is the safer default.

Buffet + Copper Peptides 1%

Copper Peptides should be kept away from retinoids (PM) and Vitamin C (which should be in PM for pure forms). So practically, the AM or PM non-retinoid nights are both options.

EUK 134 0.1%

DECIEM recommends EUK 134 in the AM, away from pure Vitamin C in the PM. It works well as a component of the morning antioxidant layer.

AM vs. PM: a complete example

Example AM routine

Cleanser
Hyaluronic Acid 2% + B5
Ascorbyl Glucoside Solution 12% (derivative Vitamin C)
Niacinamide 10% + Zinc 1%
"Buffet" multi-peptide serum
Natural Moisturizing Factors + HA (moisturiser)
SPF (always last)

Example PM routine (retinoid nights — 3–4x per week)

Cleanser
Hyaluronic Acid 2% + B5
Granactive Retinoid 2% in Squalane (or whichever retinoid you use)
100% Plant-Derived Squalane (sealing oil)
Natural Moisturizing Factors + HA (moisturiser)

Example PM routine (acid nights — 2x per week, not on retinoid nights)

Cleanser
AHA 30% + BHA 2% Peeling Solution (10 minutes → rinse)
Hyaluronic Acid 2% + B5
Natural Moisturizing Factors + HA

Note: Retinoid nights and acid nights should never overlap. The simplest pattern: acids on Tuesday and Friday; retinoid on Monday, Wednesday, Saturday.

The three-routine option: adding a mid-day routine

For those who use products midday — such as a second sunscreen application or a hydration treatment — the Skincare Routine app supports an optional third routine (Mid Routine) alongside AM and PM. This can be enabled in the app's settings.

How the Skincare Routine app handles AM/PM automatically

Every product pre-loaded in the Skincare Routine app comes with its recommended AM/PM time already configured. When you add a retinoid, it goes into PM. When you add Niacinamide, it goes into AM. The auto-sort happens without any manual configuration needed.

If The Ordinary's recommended time for a product isn't right for your personal routine, you can override it on a product-by-product basis from the Settings tab of each product. The app makes moving something from AM to PM — or enabling a product in both — a quick two-tap action.

For the conflict pairs that are naturally resolved by AM/PM separation (particularly Vitamin C and Niacinamide), the app automatically places them in their respective routines and will alert you if you try to move them in a way that creates a conflict.

Download it at skincareroutine.app.

Summary: AM vs. PM quick reference

Product	TIME
Niacinamide 10% + Zinc 1%	AM
"Buffet" peptide serum	AM
Ascorbyl Glucoside Solution 12% (Vit C derivative)	AM (or PM)
EUK 134 0.1%	AM
Alpha Arbutin 2% + HA	AM (or PM)
Retinol / Granactive Retinoid (all)	PM only
Pure Vitamin C (L-Ascorbic Acid products)	PM only
AHA 30% + BHA 2% Peeling Solution	PM only
Glycolic Acid 7% Toning Solution	PM
Lactic Acid 5% / 10%	PM (preferred)
Salicylic Acid 2% Solution	AM or PM
Hyaluronic Acid 2% + B5	AM or PM
Azelaic Acid Suspension 10%	AM or PM
Natural Moisturizing Factors + HA	AM or PM
Plant-Derived Squalane	AM or PM
SPF	AM last step — always

Getting AM and PM right is the single most impactful structural decision you make for your routine. Do it once and the rest largely falls into place.