Ingredient
Retinal
Scientific name: Retinaldehyde · Anti-aging, cell turnover
Retinal (retinaldehyde) is a vitamin A derivative that sits one step closer to active retinoic acid than regular retinol, so skin converts it faster. Korean formulas often pair it with soothing ingredients like centella or panthenol to keep it comfortable while it works on fine lines, texture, and tone.
One conversion step from retinoic acid, more potent than retinol with similar tolerance.
Good for
Caution
Photosensitizing. Avoid with acids and benzoyl peroxide. Pregnancy: avoid.
Best Korean products with Retinal
No published products use this yet.
Good fit for
- • Early fine lines, uneven texture, and dullness
- • Retinol users who want a stronger step without a prescription
- • Blemish-prone skin that also wants smoothing benefits
Worth skipping if
- • Pregnancy or breastfeeding, where retinoids are usually avoided
- • A compromised or very reactive barrier that needs repair first
Frequently asked questions
› What is the difference between retinal and retinol?
Both are vitamin A derivatives, but retinal (retinaldehyde) converts to active retinoic acid in one step, while retinol needs two. That makes retinal generally faster acting at a similar comfort level, which is why many people see results sooner.
› How do I start using retinal without irritation?
Begin two nights a week on dry skin, then build up as your skin adapts. Apply a pea-sized amount, wait a minute, then follow with moisturiser. A soothing buffer like centella or snail mucin helps reduce dryness and flaking.
› Can I use retinal with niacinamide or vitamin C?
Yes. Niacinamide pairs well and can support the barrier alongside retinal. Vitamin C is usually kept for the morning and retinal for the evening, which keeps both effective and lowers the chance of irritation.
› Should I wear sunscreen when using retinal?
Always. Retinoids can make skin more sensitive to the sun, and daily SPF protects your progress. Use a broad spectrum sunscreen every morning while you are on retinal.
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