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Head-to-head evidence comparison — which supplement is right for you?
Vitamin C (topical) 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 (2)
Outcomes where both Bakuchiol and Vitamin C (topical) 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)
Topical cosmetic only. L-ascorbic acid serums are typically 10-20% (often near pH 3 for absorption); stable derivatives are used at varying percentages. Apply a few drops to clean, dry skin, usually in the morning under sunscreen (its antioxidant action complements SPF). There is no oral, injectable, or systemic dose in this cosmetic context. This library does not provide an ingestion protocol.
morning
Leave-on topical serum (10-20% L-ascorbic acid) or a stable vitamin C derivative
Throughout
8-12 weeks
Throughout
Throughout
Throughout
8-12 weeks
8-24 weeks
Throughout
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
Use of topical ascorbic acid and its effects on photodamaged skin topography.
Arch Otolaryngol Head Neck Surg (1999) · Rct · n=19
Split-face, randomized, double-blind, vehicle-controlled trial: active L-ascorbic acid serum vs vehicle daily for 3 months in mild-to-moderate facial photodamage
Topical ascorbic acid on photoaged skin. Clinical, topographical and ultrastructural evaluation: double-blind study vs. placebo.
Exp Dermatol (2003) · Rct
6-month double-blind randomized trial comparing 5% vitamin C cream vs its excipient on photoaged skin of the low-neck and arms
Efficacy of topical vitamin C in melasma and photoaging: A systematic review.
J Cosmet Dermatol (2023) · Systematic review
Systematic review of prospective RCTs of topical vitamin C in melasma or photodamage: 7 publications, 139 total volunteers
Vitamin C (topical) has a higher evidence score (6/10 vs 4/10) and wins in 2 of 3 categories.
For even skin tone, Vitamin C (topical) has a higher relevance score (70 vs 45).
No known interactions between Bakuchiol and Vitamin C (topical) have been documented in our database. However, always consult a healthcare provider before combining supplements.