Bakuchiol vs Retinoids: A Longevity-Led Comparison

Written by Ingrid Morgan, founder of Honed Skin

The real question is tolerance

Retinoids are powerful—but not everyone can tolerate them consistently. And consistency is the only thing that makes actives worth it.

Bakuchiol is often used as a gentler alternative for people who want refinement with fewer side effects.

Understanding retinoids: the full picture

Retinoids are vitamin A derivatives — the most extensively clinically studied topical active ingredient in cosmetic and prescription dermatology. The retinoid family ranges from over-the-counter retinol (the inactive form, converted to retinoic acid in the skin) to prescription tretinoin (all-trans retinoic acid, the active form) and adapalene.

The mechanism of action is precise: retinoic acid binds to nuclear retinoic acid receptors (RARs) and retinoid X receptors (RXRs) in the cell nucleus, directly regulating gene transcription. The downstream effects include: upregulation of collagen I and III synthesis, inhibition of matrix metalloproteinases (the enzymes that degrade existing collagen), normalisation of epidermal cell differentiation, and increased cell turnover rate. This is why retinoids have clinical evidence spanning acne, photoageing, fine lines, texture irregularity, and hyperpigmentation — the mechanism operates at the genetic transcription level rather than the surface level.

A landmark 2007 study in the Journal of Drugs in Dermatology — a 12-week randomised controlled trial — confirmed that retinol significantly improved fine lines, skin texture, and collagen density versus vehicle control, with a tolerability profile sufficient for most participants to complete the trial without discontinuation.

The cost of this mechanism: because retinoids bind nuclear receptors and upregulate cell turnover, the initial weeks of use produce a predictable irritation period — dryness, peeling, photosensitivity, and sometimes significant redness. This is sometimes described as "retinol purging" and is the most common reason for abandonment. The clinical literature is clear: the answer to initial irritation is not a stronger product or more frequent application, but a slower introduction (one to two nights per week initially), sandwich application (apply retinol between two layers of moisturiser), and consistent SPF use.

Dr. Shereene Idriss, discussing this exact phenomenon on The Mel Robbins Podcast, described her own experience: "I burnt my face doing this... you got dissuaded. It's about consistency over intensity." Her recommendation: the lowest effective concentration, used five nights per week consistently, outperforms a high-concentration retinoid used erratically.

Start with the Skincare Guide

Retinoids (what they’re good at)

• supporting turnover and texture

• visible refinement over time

• helping with congestion and unevenness (for many)

The cost: irritation risk, dryness, sensitivity, a longer “settling” period.

Bakuchiol (why people choose it)

• generally better tolerated

• suits barrier-first routines

• can support a refined appearance without the same irritation profile

The trade-off: often subtler results, slower timeline, depends on formula and consistency.

The science of bakuchiol

Bakuchiol is a meroterpene phenol extracted from the seeds and leaves of Psoralea corylifolia (babchi plant), used in traditional Ayurvedic and Chinese medicine. Its emergence in evidence-based cosmetic science is relatively recent but substantively supported.

The foundational clinical evidence comes from a 2019 randomised double-blind controlled trial published in the British Journal of Dermatology — one of the most cited studies in contemporary skincare science. The study compared 0.5% bakuchiol applied twice daily to 0.5% retinol applied once daily over 12 weeks in subjects with moderate photodamage. The results:

• Both bakuchiol and retinol produced statistically significant reductions in wrinkle surface area and hyperpigmentation versus baseline
• Bakuchiol produced equivalent improvement to retinol in these primary outcomes
• Bakuchiol produced significantly less facial scaling and stinging than retinol, particularly in the first 4–6 weeks of the trial
• The bakuchiol group had a significantly lower rate of adverse events overall

Mechanistically, bakuchiol does not bind the same nuclear receptors as retinoic acid — its mechanism is distinct, involving upregulation of retinol-like genes through a different signalling pathway. A 2014 study in the Journal of Investigative Dermatology confirmed that bakuchiol upregulates the expression of retinol-responsive genes (including collagen Types I, III, and IV) without binding RAR receptors directly — explaining both its functional similarity to retinoids and its significantly more tolerable side effect profile.

This distinction matters clinically: bakuchiol achieves gene-level stimulation of collagen synthesis without the receptor-level inflammatory response that characterises retinoid adaptation. It is not simply a "weaker retinol" — it is a different mechanism producing convergent outcomes.

Which should you choose?

Practical comparison table

Choose retinoids if:

• you tolerate them

• you can commit to a slow ramp-up

• your barrier is stable

Choose bakuchiol if:

• you’re sensitive, dry, or reactive

• you’re in a season of life where your skin is changing

• you want a steady routine you can keep

Longevity is not about the strongest ingredient.
It’s about the strongest routine.

Learn about The R&R Serum

How to use either one (without collateral damage)

• introduce slowly (2 nights/week)

• moisturise on either side if needed

• never stack with other intense actives early on

• protect with SPF daily

The longevity argument for bakuchiol

The most important word in long-term skincare is not "effective." It is "sustainable."

A retinoid that is abandoned after three weeks of irritation delivers zero net benefit. A bakuchiol serum used consistently for six months, twelve months, three years — compounding its support for collagen synthesis, cell turnover, and skin texture — delivers meaningful and sustained benefit. The question is not which ingredient is theoretically more powerful in an idealised clinical model. It is which ingredient you will still be using in a year.

For women in perimenopause and menopause, where the skin's tolerance for inflammatory stimulus is actively decreasing and barrier integrity is already under hormonal pressure, bakuchiol has a specific advantage: it can be maintained through periods of skin reactivity that would require a retinoid pause. This continuity of treatment is itself a clinical advantage.

For women who tolerate retinoids and have a stable barrier, retinoids remain the gold standard active for accelerated collagen remodelling. These two positions are not in conflict — they are simply different tools suited to different skin states and different phases of life.

FAQ

Is bakuchiol “as good as” retinoids?
Different. Retinoids are more proven and often stronger. Bakuchiol is a tolerance-first option that many can maintain.

Can I use both?
Sometimes, but alternate nights and keep the rest of the routine quiet.

Is bakuchiol safe in pregnancy? Bakuchiol is increasingly cited as a pregnancy-safe alternative to retinoids (which are contraindicated in pregnancy due to the teratogenic risk of systemic vitamin A derivatives). The available evidence does not suggest safety concerns, and it does not share retinoids' mechanism of systemic vitamin A signalling. However, the clinical evidence base in pregnant populations is limited, and confirmation with your healthcare provider is always appropriate.

What concentration of bakuchiol is clinically effective? The 2019 British Journal of Dermatology landmark study used 0.5% bakuchiol applied twice daily. Most formulations use between 0.5% and 2%. Unlike retinoids, there is no established irritation threshold with higher concentrations — though the clinical benefit beyond 1% is not yet well-documented. Look for 0.5–1% as the evidence-supported range.

What about bakuchiol combined with vitamin A (retinol)? Some formulations combine low-dose bakuchiol with low-dose retinol, aiming to use bakuchiol's tolerance advantage to allow a gentler introduction of retinol. This is an emerging formulation strategy with some supporting logic — the anti-inflammatory properties of bakuchiol may partially mitigate retinoid irritation. Clinical evidence for the combination specifically is limited but growing. The HONED R&R Serum takes this approach, pairing bakuchiol with a vitamin A derivative for synergistic support.

Finish: See the full routine map here...