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Head-to-head evidence comparison — which supplement is right for you?
Tazarotene vs Thiamidol: Tazarotene has the stronger overall evidence (7.5 vs 6.5/10); they're alternatives for even skin tone — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Tazarotene 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
Apply a thin layer once daily in the evening to clean, dry skin. Strengths: 0.045% lotion, 0.05% and 0.1% cream/gel, 0.1% foam. Start every other night if irritation appears.
evening
Tazarotene 0.045% lotion
Apply a thiamidol-containing serum or cream at 0.1-0.2% twice daily to the affected area, alongside daily broad-spectrum SPF 30 or higher. Continue 12-24 weeks.
morning, evening
Thiamidol 0.2% serum
immediate
12 weeks
24 weeks
1-4 weeks
immediate
12 weeks
2-3 weeks
3 weeks
Tazarotene 0.045% Lotion for Once-Daily Treatment of Moderate-to-Severe Acne Vulgaris: Results from Two Phase 3 Trials
J Drugs Dermatol (2020) · Rct · n=1614
The two identical phase 3 registration trials for the 0.045% lotion — 1614 subjects aged 9 and older.
New Polymeric Once-Daily Tazarotene 0.045% Lotion Formulation for Moderate-to-Severe Acne: Pooled Phase 3 Pediatric Analysis
J Drugs Dermatol (2020) · Rct · n=684
A pooled paediatric SUBGROUP analysis of the two phase 3 trials, not a separate trial: 136 patients aged 10-13 and 548 aged 14-17.
Efficacy of 0.1% tazarotene cream for the treatment of photodamage: a 12-month multicenter, randomized trial
Arch Dermatol (2002) · Rct · n=563
The long photodamage trial: 24 weeks double-blind, then a 28-week open-label extension — 12 months in total, 563 patients.
Inhibition of Human Tyrosinase Requires Molecular Motifs Distinctively Different from Mushroom Tyrosinase
J Invest Dermatol (2018) · In vitro
The discovery paper, and the reason this ingredient exists: most tyrosinase inhibitors were screened against MUSHROOM tyrosinase, which is why so many lack clinical effect.
Efficacy and safety of topical isobutylamido thiazolyl resorcinol (Thiamidol) vs. 4% hydroquinone cream for facial melasma: an evaluator-blinded, randomized controlled trial
J Eur Acad Dermatol Venereol (2021) · Rct · n=50
The comparison that matters: head to head against 4% hydroquinone, the prescription-strength benchmark.
Thiamidol in moderate-to-severe melasma: 24-week, randomized, double-blind, vehicle-controlled clinical study with subsequent regression phase
J Dermatol (2021) · Rct · n=48
The study the abstract calls the FIRST 24-week randomized, double-blind, vehicle-controlled assessment of thiamidol in moderate-to-severe melasma, with a subsequent regression phase.
Tazarotene has a higher evidence score (7.5/10 vs 6.5/10) and wins in 2 of 3 categories.
For even skin tone, Thiamidol has a higher relevance score (88 vs 70).
No known interactions between Tazarotene and Thiamidol have been documented in our database. However, always consult a healthcare provider before combining supplements.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.