Retinal vs. Retinol: What the Difference Really Means – and What the New EU Rules Change

The short answer

Retinal (retinaldehyde) is the last precursor of retinoic acid and is converted by the skin in just one step – retinol needs two. As a result, retinal usually works somewhat faster and more potently, with comparable tolerability in studies. Since November 2025, new maximum limits have applied to both substances in the EU. Retinal and retinol are unsuitable for certified natural cosmetics anyway.

How do retinal and retinol differ chemically?

Both belong to the retinoid family, which is derived from vitamin A. For the skin to benefit, the respective raw material must first be converted into retinoic acid (tretinoin) – only this form can bind to the retinoic acid receptors of skin cells. Retinol goes through two enzymatic steps: first conversion to retinaldehyde, then to retinoic acid. Retinal is already this intermediate stage and only needs the final step. Fewer conversion steps theoretically mean more efficient use of the ingredient.

Is retinal really stronger than retinol?

Many marketing texts cite figures such as ‘11 times more effective’ or ‘10 times more bioavailable’ – these usually come from older cell culture and conversion kinetics studies and cannot be transferred one-to-one to clinical practice. Direct comparative studies in humans paint a more sober picture: a double-blind split-face study with 23 participants over eight weeks compared encapsulated retinaldehyde (0.05–0.1%) with retinol at the same concentration and found significant, largely comparable improvements in wrinkle depth, skin hydration and elasticity on both halves of the face. A larger tolerability study with 355 participants over 44 weeks also found no statistically relevant difference in side effects between the two ingredients. So retinal seems to deliver visible effects somewhat faster, but the often-claimed big jump in efficacy is considerably smaller in independent clinical data than in marketing.

New EU limits since November 2025

The Scientific Committee on Consumer Safety (SCCS) pointed out in 2016 and again in 2022 that total vitamin A intake from cosmetics, food supplements and diet must be added together – and in total can exceed the recommended maximum. EU Regulation 2024/996 has implemented these concerns in law since 1 May 2025, with mandatory application from 1 November 2025: since then, retinol equivalents have been limited to a maximum of 0.3% in most leave-on products and 0.05% in body lotions, and a labelling requirement applies with the notice ‘Contains vitamin A. Consider your daily intake before use.’ For highly concentrated retinal and retinol serums on the market, this means noticeable reformulations in some cases.

Why retinal and retinol don't belong in certified natural cosmetics

Regardless of the new regulation, synthetically produced retinol and retinaldehyde are generally not permitted under standards such as COSMOS or NATRUE, as they are considered nature-identical but synthetically produced substances and are not on the respective positive list of natural or naturally derived raw materials. Certified natural cosmetics brands therefore rely on plant-based ingredients with a similar principle, above all bakuchiol – an extract from the babchi plant that in comparative studies shows effects on collagen formation and wrinkle depth similar to retinol, usually with better tolerability and without being affected by the new vitamin A limits.

In practice: a retinoid-free routine that still delivers

If you do without retinal or retinol, you should focus on an intact skin barrier – it is the prerequisite for any ingredient, whether plant-based or synthetic, to be well tolerated at all. The day is best started with mild cleansing: The Facial Cleanser with gentle AHA fruit acids removes impurities without putting extra strain on the barrier. During the day, The Day Cream with ceramides supports regeneration, while classic retinoids are intended more for the evening routine – which is exactly where a rich night cream such as The Beauty Sleep Cream & Mask with shea butter comes in, giving the skin time to recover overnight. If you're looking for a complete system, the Hydra Barrier Repair Set offers a matched routine that strengthens the barrier instead of burdening it with high-dose active ingredients.

Frequently asked questions about retinal and retinol

Is retinal more irritating than retinol?

Not necessarily. Larger tolerability studies found no significant difference in side effects – what matters most is the concentration used and how slowly the ingredient is introduced, not the type of ingredient alone.

Can I still buy retinol products?

Yes, but only with the maximum concentrations that have applied since November 2025 and with the mandatory vitamin A labelling. Older, higher-dose stock may no longer be newly placed on the market in the EU.

Is there a 1:1 alternative to retinol in natural cosmetics?

There is no exact 1:1 alternative, as bakuchiol works differently chemically. In direct comparative studies, however, it showed results similar to retinol for wrinkle depth and pigmentation – with less long-term data.

Conclusion

In theory and in some studies, retinal is one step ahead of retinol, but the difference in independent clinical data is smaller than often advertised. More important in practice right now are the new EU limits since November 2025, which regulate both ingredients more strictly anyway. For certified natural cosmetics, both synthetic retinoids remain off the table – if you want to play it safe, build instead on a barrier-strengthening routine such as Cosmenia's Hydra Barrier Repair Set.