Bakuchiol vs Retinol: One 44-Person Trial, Unequal Dosing, and What It Does Not Show

Bakuchiol is sold as a plant-based, gentler stand-in for retinol, and the pitch usually leans on a single study. That study is real and worth understanding, but it is smaller and narrower than the marketing suggests. This guide walks through what the head-to-head trial found, where the headline gets stretched, and how to decide whether bakuchiol belongs in a routine.

What bakuchiol is

Bakuchiol is a compound from the seeds of the Indian plant Psoralea corylifolia, also called babchi. Despite the 'natural retinol' nickname, it is not a retinoid. It was proposed as an alternative because retinol can feel uncomfortable on skin, and the lead investigator of the main trial said as much: bakuchiol appeals to people who prefer natural products, while retinol can have side effects that make it less comfortable to use.

A trade article also describes bakuchiol as a plant-based option for brands looking for a retinol alternative, but that piece is largely promotional and features a company's own products. So the useful question is not whether it sounds appealing, but what independent testing shows.

The head-to-head trial

The core evidence is a 12-week, randomized, double-blind study in the British Journal of Dermatology, with a press release from the British Association of Dermatologists in November 2018. Key details reported across the sources:

• 44 volunteers used 0.5% creams for 12 weeks.
• Bakuchiol was applied twice a day; retinol once a day.
• Both significantly reduced wrinkle surface area and hyperpigmentation, with no statistically significant difference between them.
• Retinol users reported more scaling and stinging; bakuchiol users reported more redness.
• The press release reported improved hyperpigmentation in 59% of the bakuchiol group versus 44% of the retinol group by week 12.
• The grading dermatologist was unaware of each participant's treatment.

That is a respectable design for a cosmetic ingredient. It is also one study.

Where the headline gets stretched

'Bakuchiol is as good as retinol.' The trial found no significant difference between the two, which is not the same as showing equivalence. With 44 people, a study can easily miss a real difference. The British Association of Dermatologists spokesperson said larger studies would be needed to confirm the results.

'It works with less irritation.' The dosing was not matched. Bakuchiol went on twice daily and retinol once, so bakuchiol received about twice the application. As one critical write-up put it, the study suggests bakuchiol is less irritating, but it does not show it matches retinol's effectiveness per dose. Tolerability also was not simply 'better': the groups reported different complaints, with redness more common on bakuchiol.

'Results in weeks.' The effects were described as most marked at 12 weeks, and the changes were subtle. The same spokesperson cautioned that no cream can significantly turn back the clock, and that sun protection matters.

What is not known

The sources leave several gaps:

• No replication. The write-ups describe it as one recent study rather than a body of evidence.
• No long-term data. The trade article reports no long-term safety data, and the main trial ran 12 weeks.
• Funding detail. The critical write-up calls the study independent but does not name funders or conflicts of interest, and the press release does not mention funding.
• Pregnancy. None of the sources I opened offers a dedicated pregnancy study. If that matters to you, talk to your doctor about products during pregnancy.

Choosing between them

Treat this as a practical comparison, not a ranking:

1. If you already use retinol comfortably, this trial gives no reason to switch.
2. If retinol has been hard on your skin, bakuchiol is a reasonable, low-stakes thing to try, since in the trial its users reported less scaling and stinging.
3. Match the trial's conditions. The studied regimen was 0.5% twice daily for 12 weeks, so judge it over a similar window rather than after a week.
4. Do not assume 'natural' means non-reactive. Redness was reported in the bakuchiol group.
5. Patch test on the inner forearm or along the jaw for a few days before a full-face application.

Sun protection stays on the list

Both the press release and the surrounding commentary come back to sun protection. Anything that smooths the look of fine lines will be undone by unprotected UV, whichever ingredient you pick. A daily broad-spectrum sunscreen is part of the same routine, not an optional extra.

Takeaway

Bakuchiol has one decent, small, 12-week trial showing similar changes to 0.5% retinol in the look of wrinkles and dark spots, with different side effects and unequal dosing. That makes it a plausible option for people who find retinol harsh, and a weak basis for claiming it is the same thing in a gentler bottle. Give it about 12 weeks, keep sunscreen daily, and expect subtle changes.