Retinal and bakuchiol get lumped together as "gentler than retinol". Only one of them is still a retinoid. That is the whole fork in the road, and most comparison posts skip it so they can sell both.
Retinal (retinaldehyde) sits one conversion step away from retinoic acid. Bakuchiol is a plant meroterpene that never joins that chain. They can both be used for the look of ageing skin. They are not doing the same job.
Retinal is vitamin A. Bakuchiol isn't.
The retinoid ladder, simplified:
- Retinyl esters → retinol → retinal → retinoic acid (tretinoin is already this last form)
Each step up is stronger and usually more irritating. Retinal is popular because it is stronger than over-the-counter retinol for many people, with a reputation for being a bit more efficient, and UK brands (Medik8 in particular) built a range around it.
Bakuchiol does not appear on that ladder. Lab work suggests some overlapping gene effects, which is why "retinol-like" exists as a phrase. Overlapping is not identity. If you cannot use vitamin A, retinal is still vitamin A. Bakuchiol is the actual exit.
This is also why The Ordinary's Granactive Retinoid is the wrong "alternative" if bakuchiol is what you meant. Granactive is a retinoid ester. The UK product guide flags that mix-up.
Strength and evidence
Retinal behaves like a retinoid because it is one. Expect better traction on wrinkles, texture and, at meaningful strengths, congestion, with the usual retinoid tax: dryness, possible peel, mandatory SPF, night-time preference. Prescription tretinoin still sits above it.
Bakuchiol has a smaller file: notably a 12-week cosmetic comparison against retinol, plus lab papers. Modest fine-line and tone changes, better average tolerance. How long it takes: months, not a retinal-style "this is actually doing something" sting in week one.
If your goal is "as close to a retinoid as I can get without a prescription", retinal wins. If your goal is "not a retinoid", bakuchiol wins by definition.
Irritation is not the same conversation
People pick bakuchiol because retinol was too much. They sometimes pick retinal for the same sentence, and that is a category error.
Retinal can be better tolerated than a clumsy high-strength retinol, especially in a well-buffered cream. It can also be a lot. It is still the ingredient family that sensitive skin often cannot finish.
Bakuchiol is the one you reach for when the family itself is the problem, not the percentage. Patch test both. Neither is a wet wipe.
Daytime use
Bakuchiol is the photostable one. Morning use is normal.
Retinal is still a retinoid: night is the default, sunscreen is compulsory, and leaving it on a sunny windowsill is a good way to own expensive soup. Some modern retinals are more stable than old retinol oils. That does not make them a day serum in the bakuchiol sense.
Acne
Retinal can help congestion because retinoids help congestion. Bakuchiol should not be your acne plan. Does bakuchiol help acne: weakly, if at all, next to azelaic acid or a BHA.
Can you use both?
You can put bakuchiol in the morning and retinal at night once retinal is tolerated. That is the same logic as bakuchiol plus retinol. Don't start both in the same week. Don't mix retinal with another retinoid.
Medik8 sells both Bakuchiol Peptides (about £55) and a retinal range. That is two different customer problems, not a duet you must buy together.
Which should you use?
Retinal if you want retinoid results, you can handle some adjustment, and you will wear SPF. It is the serious middle child between retinol and tretinoin.
Bakuchiol if you are avoiding vitamin A, you want a low-drama extra, or retinal is still too much. Keep the ceiling modest.
Neither if the barrier is unhappy. Repair it first.
Beginners scared of vitamin A: bakuchiol. Beginners who actually want the retinoid path: a low retinol or a low retinal, not a plant extract as a delaying tactic you'll later call a waste of three months.
The verdict
Retinal is a stronger, still-retinoid option. Bakuchiol is a different, usually kinder ingredient with smaller proof and a smaller payoff. Choose based on whether you are staying in the vitamin A family or leaving it. "Gentler alternative" is not one bucket.
FAQs
Is bakuchiol stronger than retinal?
No. Retinal is a retinoid one step from retinoic acid. Bakuchiol is not on that pathway.
Is retinal a natural alternative to retinol?
No. Retinal is another vitamin A derivative. Bakuchiol is the plant compound people mean by "natural alternative", and even then "natural" isn't the benefit.
Can I swap retinal for bakuchiol in pregnancy?
Retinal is still a retinoid, so the usual pregnancy advice is to avoid it. Bakuchiol is used as a stand-in but is not proven safe. Read bakuchiol while pregnant and ask your midwife or GP.
Should I use Medik8 retinal or Medik8 bakuchiol?
Retinal if you want a retinoid. Bakuchiol Peptides if you don't. They are not interchangeable strengths of the same thing.