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Head-to-head evidence comparison — which supplement is right for you?
Sunscreen (SPF) vs Tazarotene: Sunscreen (SPF) has the stronger overall evidence (9 vs 7.5/10); they're alternatives for reduce wrinkles & fine lines — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Sunscreen (SPF) wins 3 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 Sunscreen (SPF) and Tazarotene have evidence — compare verdict strength side-by-side.
Topical OTC. Apply a broad-spectrum SPF 30+ sunscreen daily to sun-exposed skin as the last step of a morning routine, using an adequate amount (about 2 mg/cm² — roughly a nickel-sized dollop for the face, a shot-glass for the body) and reapply every ~2 hours of sun exposure and after swimming/sweating. Mineral (zinc oxide / titanium dioxide) filters are preferred if you're concerned about systemic absorption. There is no oral or systemic dose — it is not ingested. This library does not provide an ingestion protocol.
morning
Broad-spectrum SPF 30+, applied daily; mineral (zinc oxide/titanium dioxide) if concerned about absorption
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
Throughout
Ongoing (years)
Ongoing
Throughout
immediate
12 weeks
24 weeks
1-4 weeks
Sunscreen and prevention of skin aging: a randomized trial.
Ann Intern Med (2013) · Rct · n=903
Randomized community trial (n=903): the daily sunscreen group showed no detectable increase in photoaging (skin microtopography) after 4.5 years
Molecular mechanisms of photoaging and its prevention by retinoic acid: ultraviolet irradiation induces MAP kinase signal transduction cascades that induce Ap-1-regulated matrix metalloproteinases that degrade human skin in vivo.
J Investig Dermatol Symp Proc (1998) · Review
Mechanistic model: UV activates MAP-kinase pathways and AP-1, which upregulate matrix metalloproteinases (MMPs)
Daily Use of a Facial Broad Spectrum Sunscreen Over One-Year Significantly Improves Clinical Evaluation of Photoaging.
Dermatol Surg (2016) · Open label · n=32
Single-arm prospective study (n=32): broad-spectrum SPF 30 applied daily to the face for 52 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.
Sunscreen (SPF) has a higher evidence score (9/10 vs 7.5/10) and wins in 3 of 3 categories.
For reduce wrinkles & fine lines, Sunscreen (SPF) has a higher relevance score (90 vs 82).
No known interactions between Sunscreen (SPF) and Tazarotene 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.