What Is Retinal? A Simple Guide to This Retinol Derivative and How It Works

Retinol comes up frequently in skincare conversations, but retinal still raises a lot of questions. You may have heard it works faster while being less irritating, or you may have avoided it out of concern about unwanted reactions. The truth lies somewhere in between. Below you'll find a guide that explains what retinal is, how it works on the skin, and how to properly incorporate it into a skincare routine.

What is retinal (retinaldehyde) and where does the term come from?

Retinal, fully known as "retinaldehyde," is a form of vitamin A used in cosmetic products. It belongs to the retinoid family — substances known for their effects on skin texture, pigmentation, and fine lines.

The term comes from biochemistry, where retinal serves as an intermediary between retinol and retinoic acid. In skincare, this positioning makes it particularly interesting: the skin converts it more easily into the active form, without it being a medication.

In short:

• retinal is a topical retinoid;
• it's available in cosmetic products, without a prescription;
• the skin quickly converts it into retinoic acid, the form that produces visible results.

How does retinal work on the skin?

For vitamin A to take effect, the skin needs to convert it into retinoic acid. This is the compound that communicates directly with skin cells and influences their behavior.

The difference between forms of vitamin A lies in the number of steps required for this conversion:

• retinol requires two steps;
• retinal requires only one.

This shorter conversion explains why, in most cases, retinal delivers faster results at lower concentrations.

Once activated, retinal:

• supports cell renewal, meaning the removal of dead skin cells;
• stimulates collagen synthesis, a protein that keeps the skin firm;
• helps even out skin tone;
• contributes to regulating excess sebum.

With regular use, the first changes typically appear after about 4–6 weeks of consistent application.

Retinal, retinol, and tretinoin: what are the differences?

Retinal vs. retinol

Both forms come from vitamin A and target the same goals: smoother texture, even appearance, and collagen support. The difference lies in speed and tolerance.

Retinol:

• works more slowly;
• is often recommended for beginners;
• requires patience for consistent results.

A classic retinol-based formula is Retinol Intense Reactivating Serum, designed for gradual use and skin texture support.

Retinal:

• converts more quickly;
• delivers visible effects in a shorter time;
• requires careful introduction into your routine.

Retinal vs. tretinoin

Tretinoin is pure retinoic acid. It works directly but frequently causes irritation and requires a medical prescription.

Retinal sits between a cosmetic and a prescription treatment:

• it offers high efficacy;
• it allows better control over reactions;
• it doesn't require a prescription.

For many people, this positioning makes it easier to incorporate long-term.

What benefits can you expect?

Retinal doesn't transform your skin overnight. Results appear gradually and depend on consistency, concentration, and formulation.

In most cases, proper use delivers:

• reduction of fine lines;
• more even texture;
• less visible pores;
• fading of post-acne marks;
• long-term collagen support.

For acne-prone skin, retinal helps prevent clogged pores and may reduce the occurrence of mild inflammatory breakouts.

What retinal concentration should you start with?

Concentration matters, but it's not the only factor. The formula, encapsulation method, and presence of soothing ingredients significantly affect tolerance.

As a general guide:

• 0.05% – suitable if you're just starting out;
• 0.1% – recommended for experienced users;
• above 0.1% – only if your skin tolerates retinoids well.

Many modern products use encapsulated retinal, a technology that gradually releases the ingredient. An example is Seoul 1988 Serum: Retinal Liposome 2% + Black Ginseng, formulated for better tolerance in your evening routine.

Is retinal gentler than retinol?

It can be, but not automatically. Retinal remains an active ingredient and requires following the basic rules.

Possible reactions include:

• redness;
• flaking;
• stinging sensation;
• temporary dryness.

These reactions commonly occur during the adjustment period, also known as retinization, which typically lasts 2–4 weeks. For consistent results, introduce the ingredient gradually and support your skin with restorative products.

How to properly incorporate retinal into your routine?

Retinal should be applied exclusively in the evening, on clean, dry skin.

Evening routine, step by step

1. Cleanse your face with a gentle product.
2. Wait a few minutes until the skin is completely dry.
3. Apply a small amount of retinal.
4. Follow up with a moisturizer.

Products containing ceramides help restore the skin barrier. If you'd like to learn more about this topic, you'll find useful information in the article about ceramides published on SKINSEEN.ro.

Recommended frequency

• weeks 1–2: twice a week;
• weeks 3–4: every other day;
• after that: daily, only if the skin tolerates it.

Consistency matters more than intensity.

Combinations to avoid on the same evening

To reduce the risk of irritation, avoid applying retinal together with:

• AHA or BHA exfoliating acids;
• vitamin C in the form of ascorbic acid;
• other retinoids;
• copper peptides.

Vitamin C remains a great choice in the morning, followed by SPF.

Why does the encapsulated form of retinal matter?

Retinal is sensitive to light and air. Encapsulation protects it and helps ensure controlled release on the skin.

Commonly observed benefits:

• less frequent irritation;
• increased tolerance;
• better formula stability.

This approach is commonly found in Korean products, which make up a large part of the SKINSEEN.ro selection.

Serum or cream with retinal: how to choose?

The texture affects comfort, not final efficacy.

• Serum is best suited for combination, oily, or acne-prone skin.
• Cream provides more comfort for dry or mature skin.

Choose the formula that fits easily into your daily routine.

Retinal around the eyes: what you should know

The skin around the eyes is thin and sensitive. Only use products specifically formulated for this area.

Apply a very small amount, away from the lash line, twice a week initially. Increase the frequency only if the skin responds well.

Who is retinal suitable for?

Retinal can be a good choice if:

• you have experience with retinol;
• you want faster results;
• you're looking for a step up before prescription treatments.

If your skin reacts easily, you can start with gentler alternatives, such as Bakuchiol Plumping Serum, a plant-based ingredient with similar effects but better tolerance.

For formulas with innovative textures, there are also options with retinol micro-spicules, such as Spicule Retinol Shot 180 Serum, designed to support ingredient absorption.

Useful summary and final recommendations

• Retinal is a vitamin A derivative used in cosmetics.
• It works faster than retinol but requires gradual introduction.
• It can support collagen, texture, and skin evenness.
• It requires daily sun protection and careful attention to combinations.

This article is for informational purposes only and does not replace medical advice. For personalized decisions, consult a dermatologist or pharmacist before introducing retinoids into your routine.

Stay informed from reliable sources and discover the right products for your skin at SKINSEEN.ro!

Frequently asked questions about retinal

Can you use retinal in the summer?

Yes, with daily sunscreen application.

Does it increase sun sensitivity?

Yes. SPF becomes mandatory every morning.

Is it allowed during pregnancy or breastfeeding?

No. Topical retinoids should be avoided during these periods.

Why does the product change color?

Oxidation can alter the shade. Store the product away from light and heat.