Retinal vs Retinol: Should You Switch Your Routine?
Compare retinal and retinol research, understand why percentages are not equivalent, and plan a switch using the new formula's instructions and tolerability.
The Short Version
- Retinal and retinol are related retinoids, but the percentage on one product is not equivalent to the other.
- Trials of separate formulas cannot tell you that every retinal product is faster or better tolerated than every retinol product.
- A switch is optional when your current routine works; follow the new product's directions rather than stacking retinoids.
On this page
Switching from retinol to retinal can be a product choice, but it is not a mandatory next stage in skincare. Compare the goal, evidence, and directions for the complete formulas before replacing something that already works for you.
Retinal is also called retinaldehyde. It is a precursor of retinoic acid, while retinol is another related precursor used in cosmetic skincare. That biological relationship does not produce a universal strength conversion between two bottles.
What the Clinical Research Can Tell You
A 2018 randomized study in 40 women compared creams containing 0.05% and 0.1% retinaldehyde over three months. Both formulas improved several measures, with no significant difference between them for several of those outcomes. The study did not compare either formula with retinol. Original retinaldehyde trial
Retinol also has formulation-specific evidence. A 2015 investigation included a 62-participant, year-long vehicle-controlled study of stabilized 0.1% retinol and reported improvements in photoaging. Original stabilized retinol study
These studies support evaluating particular products and sustained use. They do not let you rank an arbitrary retinal serum above an arbitrary retinol serum or promise a fixed multiple of speed.
Why Percentages Do Not Translate Directly
| Comparison shortcut | Better question |
|---|---|
| "This percentage is larger, so it is stronger" | Is it the same ingredient in a comparable formulation? |
| "Retinal needs fewer conversion steps, so it will work immediately" | What finished-product human results support the promised timeline? |
| "My skin tolerates retinol, so I can use retinal nightly" | What starting schedule does the new product require? |
| "Two retinoids will work better than one" | Does either product advise against the combination? |
| "This is the newest option, so I should switch" | What limitation of my current routine am I addressing? |
A product's vehicle, stability, packaging, and application schedule belong in the decision. Comparing the ingredient name while ignoring those details leaves out much of what you actually use.
When a Switch Might Be Worth Considering
Name a specific reason: you dislike the current texture, want a different formulation, or need advice because the routine is irritating. If you have an unresolved acne problem, first decide whether you need an acne treatment rather than another cosmetic retinoid. Our adapalene versus retinol guide explains that distinction.
If your reason is simply that retinal appears more often on social media, keep the purchase optional. A tolerable routine is a meaningful part of the value you already have.
Before changing a prescription retinoid, ask the prescriber. A cosmetic comparison does not determine how to replace a medicine.
Use the New Formula's Starting Instructions
The Ordinary's Retinal 0.2% Emulsion illustrates why directions matter. It specifies a pea-sized amount on clean, dry face and neck in the evening, moisturizer afterward, and a weekly start with gradual progression to twice weekly as tolerated. It advises against combining with other retinoids and lists additional incompatible product categories. The Ordinary's current directions
That is a product example, not a starter recommendation or a schedule for every retinal. Its concentration also differs from those in the clinical trial above.
Write down these details for the product you choose:
- Application area and amount.
- Whether the skin should be dry.
- Starting frequency and any instructed progression.
- Moisturizer position and daytime sun protection.
- Products to keep separate.
- What the label says to do if irritation occurs.
Copying these instructions is more reliable than carrying over the frequency of your old retinol product.
Check the Whole Routine During the Change
Keep the cleanser, moisturizer, and other optional products stable where practical. Introduce one change at a time so that a texture problem or reaction is easier to trace.
Do not add an exfoliating acid, a spicule product, and a new retinoid simultaneously. Each raises its own compatibility and tolerability questions. A longer wait between the steps does not answer them.
If you need help with a prescription timing instruction, read tretinoin waits after washing versus before moisturizer. Ingredient changes do not erase a product's dry-skin requirement.
When to Get Advice
The AAD advises against retinoid use during pregnancy. If pregnant, planning pregnancy, or breastfeeding, review the product and treatment plan with your clinician rather than switching ingredients yourself. AAD retinoid guidance
Persistent irritation, a worsening rash, or an unresolved treatment goal also deserves a review. The aim of a switch is a routine that suits your skin, not simply a higher position on an ingredient ladder.
Sources
Research and product directions reviewed October 5, 2026.