Bakuchiol

How it works

Bakuchiol is structurally unrelated to retinol despite its marketing as a retinol alternative. It belongs to the meroterpene class, while retinol is a diterpene alcohol. The proposed mechanism of action involves partial agonism at retinoid-responsive gene pathways (upregulation of type I and III collagen, type IV collagen and aquaporins), but the primary activity appears to be mediated through non-retinoid pathways including anti-oxidant activity via free radical scavenging and anti-inflammatory activity via NF-kB suppression. The absence of direct retinoic acid receptor binding is the structural reason bakuchiol does not produce the peeling, flushing and photosensitivity associated with retinoids. Gene expression studies (Chaudhuri 2014) showed overlap with retinol in collagen and aquaporin regulation but distinct effects on keratinisation markers, indicating a parallel rather than equivalent mechanism.

Clinical evidence

The most-cited evidence on bakuchiol is the 2019 Dhaliwal et al. split-face randomised trial in the British Journal of Dermatology, which compared 0.5% bakuchiol twice daily to 0.5% retinol once nightly over 12 weeks in 44 participants. The trial reported comparable reductions in wrinkle surface area (around 20% in both arms) and hyperpigmentation (around 10% reduction in both arms), with less dryness and scaling in the bakuchiol arm. This is a meaningful result but comes from a single small trial. Chaudhuri's 2014 Cosmeceuticals paper demonstrated gene expression parallels to retinol. Beyond these two, the evidence base is thin: most other published work is laboratory in vitro or vendor-funded. The SCCS has not issued a restriction opinion on bakuchiol and it remains unrestricted in EU cosmetics. Pregnancy safety data is specifically absent, which is why our pregnancy skincare guide does not recommend bakuchiol despite its marketing.

Dosing and protocol

Start at 0.5% bakuchiol applied once or twice daily. Most commercial formulations sit in the 0.5 to 2% range (Ole Henriksen Goodnight Glow 1%, Herbivore Bakuchiol Serum 1%, The Inkey List Bakuchiol 1%). Unlike retinol, bakuchiol can be used morning and evening without photosensitivity concern, though SPF is still recommended because any anti-ageing regimen pairs with UV protection. No purging phase, no irritation adjustment period. Results appear at 8 to 12 weeks, similar to retinol timeline in the Dhaliwal trial. No ceiling concentration has been established; above 2% there is no published evidence of additional benefit.

Interactions with other actives

Compatible with essentially every other cosmetic active. Safely layered with niacinamide, vitamin C, hyaluronic acid, peptides, ceramides. One caveat: stacking bakuchiol with retinol on the same nights is not evidence-based and does not add up to 'double the anti-ageing effect'. They occupy partially overlapping but distinct gene pathways, so combining them produces more irritation without proportionally more benefit. If you want retinol-level efficacy, use retinol. If you want gentle anti-ageing for reactive skin, use bakuchiol alone.

Common mistakes

Two recurring bakuchiol mistakes. First, treating it as a proven drop-in replacement for retinol. One small split-face trial is suggestive but not definitive; if your anti-ageing goal is measurable wrinkle reduction at 12 months, retinol or prescription tretinoin has the decades of evidence bakuchiol does not. Use bakuchiol for its strength (gentleness on reactive skin) rather than as a head-to-head retinol beater. Second, assuming 'natural' means 'safe in pregnancy'. Bakuchiol lacks pregnancy exposure data. Absence of evidence of harm is not evidence of safety, which is why ACOG does not endorse it as a pregnancy-approved retinol alternative. Azelaic acid is the evidence-backed pregnancy choice.

FAQ

Is bakuchiol really as effective as retinol?

In one 2019 split-face trial over 12 weeks, yes. In the broader evidence base covering 40 years of retinol research, no single result has reproduced this equivalence independently yet. Treat bakuchiol as promising but not equivalent.

Is bakuchiol safe during pregnancy?

Pregnancy exposure data is absent. ACOG has not issued a specific opinion. Azelaic acid is the evidence-based pregnancy-safe alternative to retinol. See our pregnancy-safe skincare guide.

Can I use bakuchiol morning and night?

Yes. No photosensitivity, no irritation adjustment period. Morning plus evening application is the protocol in the Dhaliwal trial. Always pair with daily SPF.

Sources

• Dhaliwal S et al. Bakuchiol vs retinol split-face trial. Br J Dermatol 2019
• Chaudhuri RK et al. Bakuchiol cosmeceutical effects. Int J Cosmet Sci 2014
• Draelos ZD et al. Topical bakuchiol cosmeceutical review 2020
• EU CosIng entry: Bakuchiol
• ACOG pregnancy skincare guidance