Bakuchiol is a natural compound extracted from the seeds of Psoralea corylifolia, a plant also known as Babchi. Used for centuries in traditional Indian (Ayurveda) and Chinese medicine to treat various skin disorders, this plant was reputed for its anti-inflammatory and antiseptic properties. The name bakuchiol derives from Bakuchi, the Sanskrit term for Babchi. First isolated scientifically in 1966, bakuchiol is a meroterpene (a hybrid terpene-phenol compound) found mainly in the seeds and leaves of P. corylifolia. Historically, these seeds were used topically for skin conditions, drawing on the plant’s medicinal properties.
Since the early 2010s, bakuchiol has made a notable entry into the cosmetics industry as a natural alternative to retinol. Its skin activity profile attracted the attention of formulators looking for a plant-derived anti-ageing active offering effects comparable to retinoids, but with better tolerance. The enthusiasm for this “botanical retinol” is explained by growing demand for effective products that are gentler on the skin and suitable even for sensitive skin or for people who cannot use retinol (pregnant women, for example). An ingredient traditionally used in ancestral remedies has thus become an innovative cosmetic active, endorsed by modern science.
Anti-ageing mechanisms of action of bakuchiol
At molecular level, bakuchiol has a multitude of anti-ageing mechanisms of action that explain its rejuvenating effects on the skin. First, it is a powerful antioxidant: unlike retinol, which has relatively little antioxidant activity, bakuchiol effectively neutralises the oxidative free radicals responsible for skin ageing. By reducing oxidative stress, it helps to protect skin cells from damage caused by UV and pollution.
Bakuchiol also has notable anti-inflammatory properties. In vitro studies have shown that it significantly reduces the production of pro-inflammatory mediators such as prostaglandin E2 (PGE2) and macrophage migration inhibitory factor (MIF) in skin cells. This anti-inflammatory action is relevant because chronic inflammation accelerates collagen breakdown and skin ageing. By inhibiting these inflammatory pathways, bakuchiol can indirectly slow the ageing processes linked to inflammation.
Bakuchiol also acts directly on the synthesis of the skin’s extracellular matrix, particularly collagen. It has been shown to stimulate the production of type I collagen, essential to the firmness of the dermis. In fibroblast culture, bakuchiol increases the expression of the genes for collagen I, III and IV while reducing that of MMP-1 (matrix metalloproteinase-1, an enzyme that breaks down collagen). In practical terms, this means that bakuchiol promotes collagen renewal while inhibiting its breakdown – a double benefit for reducing wrinkles and improving skin elasticity. Research has shown in particular that it raises levels of collagen I and III and of tissue inhibitors of metalloproteinases (TIMP) while significantly lowering MMP-1 at mRNA level, suggesting protection of dermal integrity. Bakuchiol also stimulates other key components of the dermal matrix: for example, it increases the expression of fibronectin, an adhesion glycoprotein important for dermo-epidermal structure and wound healing. After 4 weeks of topical application, one study measured a significant rise in fibronectin in skin treated with bakuchiol compared with a placebo, a sign of positive skin remodelling.
As well as firming the skin, bakuchiol helps to regulate skin pigmentation. Studies have demonstrated a depigmenting effect of bakuchiol. It acts at several levels of melanogenesis: in vitro, it reduces the expression of tyrosinase (-43% measured), the key enzyme in melanin synthesis, as well as other pigmentary regulators (TRP-1, TRP-2, MITF) in melanocytes. This mechanism results in lower melanin production and pigmentary activity, which can help to fade brown marks and even out skin tone. The improvement in hyperpigmentation observed clinically with bakuchiol is therefore consistent with these effects on the melanogenic pathway.
Finally, bakuchiol also stimulates epidermal regeneration. In an in vitro wound-healing model, it was observed to significantly accelerate wound re-epithelialisation compared with retinol. It promotes keratinocyte proliferation and tissue repair, probably by inducing growth factors such as FGF7 (keratinocyte growth factor), whose levels rise with bakuchiol. This potential to improve barrier function and healing reflects a global anti-ageing approach: skin that regenerates better is more resistant and younger-looking.
In summary, bakuchiol takes a multi-target approach to skin ageing. It shares some mechanisms with retinol (collagen stimulation, cell renewal, improved skin tone) while bringing complementary effects (antioxidant, anti-inflammatory, protection of the extracellular matrix, regulation of melanin). This versatility makes it a particularly interesting ingredient for addressing the signs of ageing holistically.
Bakuchiol vs retinol: scientific and clinical comparison
Often presented as a “botanical equivalent of retinol”, bakuchiol naturally invites comparison with it, in terms of both anti-ageing efficacy and tolerance. Scientifically, the two molecules lead to functionally similar results in the skin, although their modes of action differ. Comparative gene expression analyses have shown that bakuchiol can mimic many of the effects of retinol at cellular level, without sharing its chemical structure. For example, in a 2014 study, Chaudhuri and Bojanowski observed that applying bakuchiol to reconstructed skin models induces gene regulation very close to that of retinol for multiple markers of dermo-epidermal integrity (collagens, laminins, E-cadherin, aquaporin-3, etc.). This confirms the “retinol-like” character of bakuchiol in terms of pro-collagen and pro-renewal cell signalling.
There are nevertheless differences. Unlike retinoids, bakuchiol does not directly activate the nuclear RAR receptors (retinoic acid receptors) involved in the effects of retinol. It has been reported that retinol increases the expression of the RAR-β and RAR-γ receptors, whereas bakuchiol does not. This could partly explain why bakuchiol does not cause the same adverse effects as conventional retinoids, which through RAR can disturb certain biological pathways (RAR are involved in foetal development, hence the restrictions on retinoid use during pregnancy). Bakuchiol also has properties that retinol lacks – for example its high antioxidant power and its photostability, which allow it to be used during the day without degradation or photosensitisation. Retinol, by contrast, is photosensitive and degrades under UV light, which requires night-time use and formulation precautions to protect it from oxidation. In short, from a mechanistic point of view, bakuchiol and retinol converge on the beneficial effects (collagen synthesis, regulation of epidermal differentiation, etc.) while diverging on certain pathways (no action on RAR for bakuchiol, its own antioxidant activity, etc.), which gives bakuchiol a similar but safer efficacy profile.
Clinically, the direct comparison of bakuchiol and retinol has been the subject of rigorous studies. A pivotal randomised, double-blind study published in 2019 evaluated a 12-week treatment with either 0.5% bakuchiol applied twice a day or 0.5% retinol applied once a day. The results showed that both treatments significantly improve the signs of photoageing. In particular, the reduction in wrinkle surface area and hyperpigmentation was equivalent in the two groups, with no statistical difference in efficacy between bakuchiol and retinol. Notably, the bakuchiol group showed clearly superior tolerance: retinol users reported significantly more adverse effects such as peeling, redness and stinging, whereas bakuchiol caused few reactions, apart from slight transient redness in some users at the start of use. Neither treatment caused photosensitivity during the study. The authors concluded that bakuchiol “is comparable to retinol in improving photoageing, while being better tolerated”. These clinical data therefore confirm that bakuchiol offers a very favourable efficacy-to-side-effect ratio compared with retinol.
Another aspect of the comparison concerns safety in use. Whereas retinoids are contraindicated in pregnant women because of their teratogenic risk, bakuchiol, which does not act via retinoic acid, is often proposed as a potentially safe alternative during pregnancy. Although data on this point are still limited, some experts suggest that, on the basis of its mechanism of action, bakuchiol could be an option for pregnant or breastfeeding patients who want an anti-ageing active. Caution is still needed in the absence of formal clinical studies in pregnant women, but no systemic adverse effects have been reported to date for topical use of bakuchiol.
In short, bakuchiol positions itself as an equivalent of retinol in terms of anti-ageing effects, while offering better skin tolerance and flexibility of use (day and night, including on sensitive skin or in particular conditions). For professionals, it is an asset for formulating high-performance anti-ageing skincare without the constraints associated with conventional retinoids.
Topical efficacy and tolerance: review of recent scientific studies
Since 2019, many scientific publications have supported the potential of bakuchiol in cosmetics. In addition to the comparative study by Dhaliwal et al. cited above, other clinical and preclinical work has confirmed the anti-ageing efficacy of bakuchiol and its good skin tolerance.
For example, an open-label study conducted by Draelos and colleagues (2020) on 60 volunteers with sensitive skin evaluated a skincare regimen including a bakuchiol cleanser and moisturiser. After 4 weeks, 100% of participants showed improvement in the softness, clarity, radiance and overall appearance of their skin. Instrumental measurements showed increased hydration with no disruption of barrier function (no rise in TEWL), a sign that bakuchiol is suitable for sensitive skin. Only 10% of subjects with eczema reported slight transient stinging after application, and no other notable adverse effects were observed. These results underline the gentleness of bakuchiol even in people with reactive skin.
Other research has looked at formulas combining bakuchiol with antioxidants. Goldberg et al. published two open-label studies in 2019 and 2020 on a night serum containing bakuchiol combined with vitamin C and melatonin. In the first series of tests (more than 100 subjects in total), users saw a significant improvement in skin firmness, a reduction in wrinkle depth and a decrease in uneven pigmentation. The second study, of 24 subjects over 24 weeks, confirmed substantial benefits on skin texture, tone evenness, redness and wrinkles, with marked radiance and a rejuvenated appearance from 12 to 24 weeks. Tolerance of the serum was good: only mild, temporary dryness or stinging was reported by a few participants. This work suggests that bakuchiol fits effectively into multi-active formulations and makes a significant contribution to anti-ageing results, without impairing the overall tolerance of the product.
A European team (Narda et al., 2020) studied at a more fundamental level the action of a bakuchiol + vitamin C + melatonin combination on cell models and skin explants. They observed increased filaggrin and aquaporin 3 in keratinocytes (a sign of better barrier function), as well as a rise in collagen I and III in fibroblasts and in procollagen I and tropoelastin in explants of aged skin. These mechanistic data confirm that bakuchiol, especially in synergy with other actives, induces biological changes consistent with anti-ageing effects (ECM stimulation, hydration, etc.), which translate clinically into skin improvements.
Finally, a recent French study (Bacqueville et al., 2020) looked at a serum combining bakuchiol and an extract of Vanilla tahitensis. After 56 days of application in 43 women, assessments showed a significant improvement in facial firmness, a decrease in the depth and volume of wrinkles, and a more luminous complexion. The investigating dermatologists rated skin tolerance as “very good” and no eye irritation was noted (the product being applied to the whole face, including the eye contour), with an “excellent” ophthalmological assessment. This work illustrates not only the efficacy of bakuchiol on skin slackening (an area where retinoids are generally less well documented), but also the possibility of combining it with other natural extracts to enhance its effects.
In summary, recent publications (since 2019) converge in validating that bakuchiol has tangible clinical anti-ageing effects – reduced wrinkles, improved skin tone and texture, firming – without the usual drawbacks of retinoids in terms of irritation or sensitisation. Alone or combined with other actives, it has proved effective on various parameters (wrinkles, dark spots, elasticity, hydration) in populations ranging from normal to very sensitive skin. This body of evidence, still emerging a few years ago, is now solid and supports the use of bakuchiol as a credible, proven dermocosmetic ingredient for professional anti-ageing skincare.
Galenic innovations and formulation synergies
The success of bakuchiol in cosmetics has encouraged research into optimised formulations to make full use of its strengths. Although bakuchiol is relatively stable and less demanding than retinol (it does not degrade under UV light and does not cause photosensitivity), incorporating it into effective formulas benefits from modern galenic advances. Because of its structure (an aromatic ring and a long hydrocarbon chain) and its low water solubility, scientists have explored innovative delivery systems to improve its delivery to the skin. Studies mention, for example, the use of nanotechnologies: encapsulating bakuchiol in polymer nanospheres, nanoemulsions or liposomes, in order to increase its penetration into the epidermis, protect the ingredient from oxidation and gradually release the active into the skin. These micro- and nanoparticulate approaches also make it possible to combine bakuchiol with other actives within the same particle to enhance their effects. One publication reports the co-encapsulation of bakuchiol with quercetin (a polyphenolic antioxidant) in polymer microspheres, demonstrating controlled release and improved biological efficacy on markers of skin ageing. Similarly, recent literature highlights the value of carriers such as cyclodextrins and hydrogels for stabilising bakuchiol and making it easier to incorporate into aqueous formulas, widening the range of possible textures (gel serums, light creams, etc.) without necessarily relying on high percentages of organic solvents.
At the same time, active synergies involving bakuchiol are attracting the attention of formulators. Given its versatile profile, bakuchiol can complement or reinforce the action of other anti-ageing ingredients. One notable line of development is the combination of bakuchiol with retinol itself. Rather than setting them against each other, it has been found that they can be complementary in the same formula. Because of its photostability, bakuchiol can protect retinol from oxidation and photodegradation, prolonging its activity in a day product, for example. In return, the presence of a low dose of retinol alongside bakuchiol could amplify certain biological effects (retinol remaining the “gold standard” for stimulating certain skin receptors). A recent study conducted by the company ISDIN explored a “tri-retinoid” complex combining 0.1% retinaldehyde (RAL) with bakuchiol and an extract of Vigna aconitifolia (another plant active with retinoid properties). The in vitro results indicated that bakuchiol and Vigna could potentiate the effect of retinaldehyde on epidermal differentiation and barrier restoration, without increasing irritation. Above all, the 28-day open-label clinical study of this combined formula showed rapid and significant improvements: on average +5.6% firmness, +13.9% elasticity, -43.2% number of wrinkles and +7% skin tone evenness, with a reduction in crow’s feet observed in 100% of subjects, all with very good tolerance (no notable irritation). This type of work suggests that bakuchiol can act in synergy with a retinoid to deliver strong anti-ageing performance while reducing the overall irritation profile of the formula. It can be seen as a way of “taming” retinol: thanks to bakuchiol, the combination would make it possible to benefit from the strong effect of retinaldehyde while maintaining skin tolerance.
Beyond retinoids, bakuchiol works well with other families of actives. Classic antioxidants (vitamins C and E, resveratrol, niacinamide, etc.) are good partners, because bakuchiol adds its own antioxidant and anti-inflammatory activity, creating a reinforced photoprotective effect when combined with these co-actives. For example, in a multi-active night serum, adding bakuchiol alongside vitamin C and melatonin showed improved protection against UV damage and a more even skin tone in users.
Cosmetic peptides are another potential synergy. Some biomimetic peptides also stimulate collagen or elastin through different mechanisms (direct activation of fibroblasts, inhibition of degradative enzymes). Combining a pro-collagen peptide with bakuchiol could therefore have an additive or even multiplicative effect on firmness and dermal density. In practice, brands already offer formulas that combine bakuchiol and peptides to target firming, drawing on the fact that while bakuchiol encourages cell renewal and collagen synthesis, peptides can reinforce the skin’s structure through another line of action. Although few academic studies have yet quantified this peptide-bakuchiol synergy, the scientific logic supports it and field feedback is promising in terms of improved skin texture and elasticity.
Finally, galenic innovations are emerging to make it easier to incorporate bakuchiol into sophisticated multi-active products. For example, dual-chamber encapsulations and separate systems are appearing that mix bakuchiol and retinol at the last moment, to guarantee maximum stability of each active until application. Emulsions stabilised by advanced technologies (liquid crystal nanoemulsion, lamellar gels) make it possible to incorporate bakuchiol without high levels of solvents, improving the sensory experience for the end consumer. The aim is to get the most out of bakuchiol without compromising on formulation – which, for R&D professionals, opens up exciting possibilities for formulation creativity.
