Retinol vs Retinal: What Is the Difference and Which Should You Use?

If you have researched anti-ageing skincare, you have met retinol. It is widely regarded as the gold standard non-prescription ingredient for wrinkles, texture and collagen support [1]. More recently another form of vitamin A has been gaining attention: retinal, also called retinaldehyde.

Here is what the science actually says about the difference, and how to choose.

The vitamin A family

"Retinoid" is the umbrella term for all forms of vitamin A used on skin. They differ in how many conversion steps the skin needs to turn them into the active form, retinoic acid, which is what binds to receptors in skin cells and drives the results [1]. From most to least direct:

• Retinoic acid (tretinoin): prescription only. Already active, no conversion needed.
• Retinal (retinaldehyde): available over the counter. One conversion step.
• Retinol: widely available. Two conversion steps.
• Retinyl palmitate: the weakest. Three conversion steps.

Fewer conversion steps generally means more potency, and prescription tretinoin delivers the strongest results but also the most irritation [1].

What is retinol?

Retinol is the most widely available over-the-counter form. Applied to skin, enzymes convert it first to retinal, then to retinoic acid. Some is lost at each step, which is why higher concentrations are needed than with prescription retinoids.

It has the deepest evidence base of any non-prescription anti-ageing active [1]. A 2025 network meta-analysis of 23 randomised controlled trials with 3,905 participants found isotretinoin, retinol and tretinoin all significantly improved fine wrinkles, and that retinol and tretinoin were superior for hyperpigmentation [2].

Best for: beginners to vitamin A, mildly sensitive skin, and anyone wanting gradual long-term results with a well-established evidence base.

Try: the Propaira Retinol Plus Cream (0.25%), a sensible starting strength for most skin types.

What is retinal (retinaldehyde)?

Retinal sits one conversion step from retinoic acid, so in principle it acts more directly than retinol.

A 2025 review of cosmeceutical actives reports that next-generation retinoids show efficacy comparable to tretinoin with improved tolerability, while stating plainly that the studies supporting this are small and short-term [3].

Worth being straight with you, because marketing often overstates this: retinal is frequently promoted as many times stronger than retinol, but large head-to-head trials directly comparing the two are still limited [3]. The fair summary is that retinal is a credible, effective retinoid, and retinol remains the more thoroughly studied of the two [1][2].

Best for: people who already tolerate retinol and want to progress.

So which should you use?

For most people the honest answer is that the specific form matters less than using a retinoid consistently, at a strength your skin tolerates, with sunscreen. Both work through the same pathway, and consistency over months is what produces visible change [1][2].

Start with retinol if you are new. Consider retinal once you have adapted.

How to introduce vitamin A

Build up gradually so the skin can adapt [1].

Weeks 1 to 2: once or twice a week in the evening, after cleansing and before moisturiser. A pea-sized amount for the whole face.

Weeks 3 to 4: if there is minimal redness or peeling, move to every other night.

Week 5 onwards: increase towards nightly as tolerated.

Mild dryness and flaking in the early weeks is expected and usually settles [1]. Give it around 12 weeks before judging results.

The non-negotiables

Apply vitamin A in the evening only. Follow with a barrier-supporting moisturiser such as Dermaceutic Panthenol Ceutic or K Ceutic. And wear broad-spectrum SPF 50+ every morning: UV is the main driver of visible facial ageing, so sun protection is what protects the results you are working for [1].

What about combining actives?

Vitamin C in the morning and a retinoid at night is a well-established pairing, since they work on different parts of the same problem [4]. Avoid layering multiple strong exfoliating acids on retinoid nights, which is a common cause of irritation [5].

Choosing your product

New to vitamin A? Start with the Propaira Retinol Plus Cream (0.25%). Once your skin has adapted, typically after 3 to 6 months of consistent use, the Dermaceutic Activ Retinol range offers 0.5% and 1.0% strengths.

Explore our anti-ageing range and serums. If you are unsure which strength suits your skin, book a consultation with our team.

References

1. Quan, T. (2023). Human skin aging and the anti-aging properties of retinol. Biomolecules, 13(11), 1614. https://doi.org/10.3390/biom13111614
2. Lin, L., Chen, X., Liu, C., Wang, Q., Lian, W., Xu, X., Guo, Y., Zhong, H., Zhong, J., Zhao, N., Cheng, W., Shu, P., & Xu, Z. (2025). Comparative efficacy of topical interventions for facial photoaging: A network meta-analysis. Scientific Reports, 15. https://doi.org/10.1038/s41598-025-12597-0
3. Crespi, O., Rosset, F., Pala, V., Sarda, C., Accorinti, M., Quaglino, P., & Ribero, S. (2025). Cosmeceuticals for anti-aging: Mechanisms, clinical evidence, and regulatory insights—A comprehensive review. Cosmetics, 12(5), 209. https://doi.org/10.3390/cosmetics12050209
4. Correia, G., & Magina, S. (2023). Efficacy of topical vitamin C in melasma and photoaging: A systematic review. Journal of Cosmetic Dermatology, 22(7), 1938–1945. https://doi.org/10.1111/jocd.15748
5. Karwal, K., & Mukovozov, I. (2023). Topical AHA in dermatology: Formulations, mechanisms of action, efficacy, and future perspectives. Cosmetics, 10(5), 131. https://doi.org/10.3390/cosmetics10050131

This article is general information about skincare ingredients and is not personal medical advice. If you have a specific skin concern, please speak with your GP, dermatologist or one of our therapists.