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Head-to-head evidence comparison — which supplement is right for you?
Tretinoin (Retin-A) wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (1)
Outcomes where both Bakuchiol and Tretinoin (Retin-A) have evidence — compare verdict strength side-by-side.
Topical cosmetic only. Bakuchiol is typically formulated around 0.5-1% in leave-on serums or creams and applied to clean skin once or twice daily. Unlike retinol it is not photolabile, so it can be used AM or PM, though daily sunscreen is still recommended. There is no oral, injectable, or systemic dose — it is not ingested. This library does not provide an ingestion protocol.
any
Leave-on topical serum or cream (0.5-1% purified bakuchiol)
Prescription topical: a pea-sized amount of 0.025%-0.1% cream or gel applied to clean, dry skin once nightly. Start low-strength and every-other-night to build tolerance. A prescription drug used under clinician direction — not a supplement regimen.
before-bed
Topical cream or gel, 0.025%-0.1% (prescription)
Throughout
8-12 weeks
Throughout
Throughout
12-24 weeks
12-24 weeks
Months
8-12 weeks
Prospective, randomized, double-blind assessment of topical bakuchiol and retinol for facial photoageing.
Br J Dermatol (2019) · Rct · n=44
Randomized, double-blind, 12-week study: 44 patients applied bakuchiol 0.5% cream twice daily or retinol 0.5% cream daily
Bakuchiol: a retinol-like functional compound revealed by gene expression profiling and clinically proven to have anti-aging effects.
Int J Cosmet Sci (2014) · In vitro
Comparative gene-expression profiling in a full-thickness skin model showed great similarity between retinol's and bakuchiol's effects on the gene-expression profile
Trichloroacetic acid model to accurately capture the efficacy of treatments for postinflammatory hyperpigmentation.
Arch Dermatol Res (2020) · Open label · n=20
Prospective, non-randomized vehicle-controlled trial in 20 subjects (phototypes IV-VI) with a history of acne-induced post-inflammatory hyperpigmentation
Topical tretinoin improves photoaged skin. A double-blind vehicle-controlled study.
JAMA (1988) · Rct
Randomized, double-blind, vehicle-controlled trial of topical tretinoin for photoaged forearm and facial skin
Tretinoin emollient cream: a new therapy for photodamaged skin.
J Am Acad Dermatol (1992) · Rct
Multicenter double-blind vehicle-controlled trial of tretinoin emollient cream for photodamaged skin
Long-term treatment of photoaged human skin with topical retinoic acid improves epidermal cell atypia and thickens the collagen band in papillary dermis.
J Am Acad Dermatol (2005) · Open label
Long-term topical retinoic acid on photoaged human skin assessed histologically
Tretinoin (Retin-A) has a higher evidence score (8/10 vs 4/10) and wins in 2 of 3 categories.
For reduce wrinkles & fine lines, Tretinoin (Retin-A) has a higher relevance score (80 vs 65).
No known interactions between Bakuchiol and Tretinoin (Retin-A) have been documented in our database. However, always consult a healthcare provider before combining supplements.